© 2018 - WhiteHat Education Technology Private Limited ...

© 2018 - WhiteHat Education Technology Private Limited.

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Topic Practice makes perfect

Class

Description

Narrative

Susan helps her father, Mike, during a sale as the store assistant is absent.

They decide to create a magnificent tower of books that is sure to grab

people’s attention.

Math

In this class, students will be applying the concepts of multiplication and

division simultaneously to solve real-life problems. They will also learn to

solve multi-step problems involving multiplication and division using visual

models.

Class M2-G3-C15

Class Time 60 mins

Goal

● (-1) Recall: Solve word problems involving rupees and paise using

₹ symbol appropriately.

● (0) Core: Solve word problems involving multiplication and division

using an equation with a letter as an unknown in real-life contexts.

(3.OA.A.3)

● (+1) Advanced: Solve multistep word problems that require using

the four operations to solve the equation. (4.OA.A.3)

● (+2) Accelerate: Write simple expressions involving calculations,

and interpret numerical expressions. (5.OA.A.2)

Resources

Required

● Teacher Resources

○ Earphone with mic

○ Tablet-Stylus

http://www.corestandards.org/Math/Content/3/OA/#CCSS.Math.Content.3.OA.A.3

http://www.corestandards.org/Math/Content/4/OA/A/3/





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● Student Resources

○ Earphone with mic (optional)

○ Tablet-Stylus (optional)

○ Pen-Paper

Class Structure 1. Warm-Up

2. TA and SA

3. AA1, AA2, and AA3

(optional - basis student ability/time)

4. Create

5. Wrap-Up

1. 3 mins

2. 20-25 mins

3. 15 mins

(5 mins each)

4. 10-12 min

5. 3 mins

Use discretion

Start the video call from H2H

Warm-Up (3 min)

● Connect with the student

● Get the student to smile

Teacher Action Student Action

Ask the student to shift to full-screen mode.

Invite the parent to witness the class.

Hello, <...>!

How are you? How is your day shaping up?

Encourage the student to share about their day.

Show interest and curiosity without asking any

personal questions.

Student shares about their day.

Have you ever gone shopping? Do you know

anything that we shop has a cost? We need to

pay money to the shopkeeper to buy those

Some Response.




4

things. Money comes in different shapes and

sizes. It comes in metal and in paper.We use

different currencies depending upon in which

country we live. We have learned Dollars and

cents in our previous classes. Today we will learn

about rupees and paise as well.

Let’s try solving this. If you buy 5 packs of

juice and each pack costs 20 rupees. How much

money will you pay to the shopkeeper?

Some response.

You will pay 100 rupees for 5 packs as each

pack costs 20 rupees .

Today, we shall do a lot of calculations that

involve money. we shall also see how both

multiplication and division help us in calculating

money.

Some response.

We will visit Mike’s shop today. He owns a

bookstore in Mathachussets and he is

conducting a sale today. Mike is

short-handed so Susan is helping her

father. She’s relying on you to make the

sale a success. Let’s join her and give our

best!

Core Concepts

● Recall (-1):Solve word problems involving rupees and paise using ₹ symbol

appropriately.. (2.MD.C.8)

http://www.corestandards.org/Math/Content/2/MD/C/8/




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● Core (0): Solve word problems involving multiplication using an equation with a letter

as an unknown in real-life contexts. (3.OA.A.3)

● Advanced (+1): Solve multistep word problems posed with whole numbers and having

whole-number answers using the four operations, including problems in which

remainders must be interpreted. (4.OA.A.3)

● Accelerate (+2): Write simple expressions that record calculations with numbers, and

interpret numerical expressions without evaluating them. (5.OA.A.2)

Teacher Activity (10-15 mins) - THE BIG SALE BEGINS

Compulsory

● Initiate screen share by the student

● Allow the student to ‘do’ the activities

● Provide the support where needed

Student opens <Teacher Activity> in screen

share mode.

http://www.corestandards.org/Math/Content/3/OA/#CCSS.Math.Content.3.OA.A.3






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Susan is helping her father in the store. Let’s

make Susan’s job easier by calculating the price

of the products. Your knowledge of the different

currency terms will be useful.

Student is excited by the storyline.

Are you ready to help her? Student response

Student clicks on the BEGIN button to start

the activity.

A group of young customers are shopping at

the store. They have many questions for

Susan. It’s her responsibility to clear all their

doubts. However, Susan feels unsure

because this is her first time working in the

store. She needs your help! Guide Susan

with your knowledge.

The cost of a car toy is 35 rupees. Can you

help the customer with calculation?

The student listens to the narrative.




7

TA- Q1

Ask the student to read the question aloud.

What is the cost of a toy car? 35 rupees.

How much money does the customer tender? Customer tenders 3 five rupee coins

and 2 ten rupee coins.

We should find out how much money the

customer tendered in rupees. How many rupees

are there in 3 five rupee coins?

1 five rupee coin equals 5 rupees. So,

3 five rupee coins will be equal to 3 times 5

rupees. That will be 15 rupees.




8

Take a snap of the whiteboard work using

or on top

right.

Keep asking the student if they can see the

whiteboard activity.

How many rupees are there in 2 ten rupee

coins?

1 ten rupee coin is equal to 10 rupees.

So, 2 ten rupee coins will be equal to 2

times 10 rupees.

That will be 20 rupees.




9


or on top

right.



Click on Add to Wallet to validate.

Yes, two times 10 rupees is 20 rupees. What

is the total amount that the customer tenders?

The total amount will be the sum of 15

rupees and 20 rupees. This totals to 35

rupees.

So, we know that the toy car is worth 35

rupees. The customer has 35 rupees too. Can he

purchase the toy car?

Yes.




10

That’s right. We used both multiplication and

addition in this problem. First we converted 10

rupee coins and 5 rupee coins into rupees and

second we found the total rupees that we need

to purchase the car. Can you tell me which one

did we use for what?

Yes.

We used multiplication to convert

rupee coins to rupees and then used

addition to find the total rupees.




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TA- Q2


What is the cost of the book? 55 rupees.

How much money does the customer tender? 2 quarters of a hundred rupee.

What is the value of 2 quarters of a hundred

rupees?

One quarter of a hundred is equal to

twenty -five rupees. Then 2 quarters of a

hundred will be equal to 2 times

twenty-five rupees.




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Yes. 2 times twenty-five rupees can also be

written as 25 + 25. Right?

Yes. We can add 25 two times.

This totals to 50 rupees.


or on

top right.



Yes. Will the customer be able to purchase

the book?

Why?

No.

The cost of the book is 55 rupees and

the customer has only 50 rupees.




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Yes! Correct.

TA- Q3





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4 robot toys cost 64 rupees. What’s the cost

of each robot toy?

What is the cost of 4 toys? 4 toys cost 64 rupees.

Which mathematical operation will you use

to find the cost of one toy?

Division.

How do you know? 64 rupees are to be distributed equally

among 4 toys. Hence, we will use division.

Right. We have to find the cost of one toy?

Hence this is the unknown. How do you put the

unknown in any division equation?

We use an alphabet like “a” for the

same.

This is what we studied in our last class.

Can you write the division equation?

Yes. The division equation is

4 4 a6 ÷ =

64 is a bigger number to divide by 4. So, for

this division, we will use the area model. Do you

remember the method?

If the student does not remember the area

model, explain that the dividend is broken into 10

times the divisor and the remaining.

Yes. I remember.

How will we expand 64? I will expand 64 into 10 times 4 and

the remaining.




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Yes, let’s see how you will write it . 64 = 40 + 24

So, how will you calculate? 64 divided by 4 would be the sum of

40 divided 4 and 24 divided by 4.

Can you explain this on the WB? Yes.

4 4 0 4 6 = × 1 + × 6


or on

top right.



So, what is 64 divided by 4.

It is 10 + 6. That is 16.




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Yes. So what is the cost of one robot toy? 16 rupees.

TA- Q4 Ask the student to read the question aloud.




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Susan has 7 sticky notes of each of the 3

colors. How many sticky notes does she have?

How many sticky notes of each color does

Susan have?

7

How many colors are there? 3

What mathematical operation would you use

to find out the total number of sticky notes?

Multiplication.

Yes, we would need to multiply sticky notes

of each color with the number of colors available.

Total number of sticky notes is unknown here.

3 a 7 × =




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Let us take that as “a”. Can you write the

multiplication equation?

This is how we write the multiplication

equation. What is the total number of sticky

notes?

It is 3 times 7 which is equal to 21.

So, what is the value of a? a = 21

This is how we identify the unknown in a

multiplication equation. Can you say that as a

sentence?

Seven multiplied by three is

twenty-one.

Probing question

When a number is multiplied by 1, what is

The number itself.




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the product?

That’s right. Any number multiplied by 1

gives the number itself as the product. What is

the product if one of the factors in the

multiplication equation is zero?

Any number multiplied by zero gives zero as the

product. Let me tell you another interesting

thing.

We have also studied that if we multiply a

number by a 10, then we write one zero at the

end. Similarly, if we multiply a number by a 100,

then we write two zeros at the end.

Let’s understand this on the WB.

Zero.


or on

top right.






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TA- Q5


How will you find the number of the

notebooks? Will you divide or multiply?

Divide.

Yes. We know each notebook costs 8 rupees.

We have to find out how many groups of 8 will

make 120 rupees. How will we find this?

We will find this by dividing 120 by 8.

We have to find the number of notebooks.

So, that is the unknown here. How will you write

the division equation?

20 a 1 ÷ 8 =




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That’s right. Let’s use the area model again

here. How will we expand 120?

I will expand 120 into 10 times 8 and

the remaining.

How will you write it as? 120 = 80 + 40

So, how will you calculate this? 120 divided by 8 would be the sum of

80 divided 8 and 40 divided by 8.



or on

top right.



So, what is 120 divided by 8? It is 10 + 5. That is 15.




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Yes. So how many notebooks can be bought? 15




23

TA- Q6

Error analysis

Susan has 8 five rupee coins in one hand

and 9 five rupee coins in another. Does Susan

have more than a hundred rupee?


How many five rupee coins does Susan have

in total?

8 five rupee coins in one hand and 9 in

another hand.

We have to find out whether Susan has more

than 100 rupees.

We will first convert the five rupee

coins into rupees.




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How many rupees are there in 1 five rupee

coin ?

1 five rupee coin has 5 rupees.

So, how many rupees does Susan have? It would be the sum of 8 times 5 and 9

times 5. So, it would be 40 + 45 = 85

rupees.

So, does Susan have more than 100 rupees? No, she has 85 rupees which are less

than 100 rupees.

Probing question

We multiplied 5 with both 8 and 9 to get the

total rupees that Susan had. How else could we

have found this? Can we add the total five rupee

coins that Susan had and then find the answer?

Yes, the total 5 rupee coins Susan has

is 8 + 9= 17.




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So, how many rupees Susan has? It would be 17 times 5 rupees.

This is right. How would you find this out? I will break 17 into 10 and 7 and

multiply them with 5.

Can you show me on the WB?


or on

top right.



Susan has 85 rupees. We added 8 and 9,

and then multiplied 17 with 5 to get 85. This is

the same answer that we had got after

multiplying 8 with 5 and 9 with 5 separately and

then adding them. Let me show this on a WB.





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or on

top right.



With your help, Susan was able to guide the

customers and make their shopping experience

very pleasant. She is pleased to do her bit to

reduce her father’s workload,

<use this if the teacher moves to AA1>

However, she still has other tasks to handle at

the store so let’s continue supporting her!

<use this if the teacher skips to CA>

However, Mike and Susan haven’t started

working on the main attraction of the sale yet.

The tower of books will make their bookstore

incredibly popular.

Student Activity (10 mins) - THE SALE CONTINUES

● Optional, if the student has confidently solved all the problems in Teacher Activity

● Pick a maximum of 2 questions only. Choose questions corresponding to which student

struggled in the earlier activities

● Lead the student to solve the problems in these activities

Susan is getting the hang of assisting the

customers. However, she now has 2 tasks to

handle at the same time. She has to help more

customers and also keep the store organized.




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This is quite a challenge for Susan. Let’s see how

we can support her!

SA- Q1

One chocolate costs 50 rupees. Can a

customer buy one chocolate with 4 ten rupee

coins and 2 five rupee coins?

We know that it becomes easier to convert

all the currencies to one currency unit. Which unit

should we convert these to?

Rupees.

Why? It is easier to convert ten rupee coin

and five rupee coin to rupees.

How much money does the customer have?

The customer has 4 ten rupee coins

and 2 five rupee coins.




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This equals 4 times 10 and 2 times 5. How

much money does the customer have in rupees?

40 + 10= 50 rupees.

Click on Add to Wallet to validate.

What is the price of one chocolate in rupees? 2 quarters. This means 50 rupees.

So, does the customer have sufficient

money to buy a chocolate?

Yes, the customer has 50 rupees.




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That’s the right answer.




30

SA- Q2

Error analysis

If a customer has 4 five rupee coins, can he

buy a gift card that costs 20 rupees? What do

you think?

We know that it becomes easier when we

convert all the currency units to one currency

unit. Which currency should we convert coins to?

Rupees

What is the cost of one gift card? 20 rupees.




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How much money does the customer have? 4 five rupee coins which are equal to

20 rupees.

So, does the customer have sufficient

money?

Yes.

That’s right.




32

SA- Q3

42 books are divided equally in 3 drawers of

the shelf. How many books are there in one

drawer?

Which mathematical operation will we use

here?

Division.

Why? We will divide because 42 books are to

be distributed equally in 3 drawers of the

shelf.

What is it that we have to find here? The number of books in one drawer.




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So, that is the unknown. Let us take that as

“b”.

Can you write the division equation?

2 4 ÷ 3 = b

How will you find this? I will divide 42 into 10 times 3 and the

remaining. So, 42= 30 + 12

So what is the answer? 42 ÷ 3 will be equal to the sum of 30

÷ 3 and 12 ÷ 3. Hence it will be

10 + 4= 14

Student feeds the answer and presses the

next button.




34

SA- Q4

The price of a teddy has been reduced by 2

rupees. If a customer buys 13 such teddies, how

many rupees will she save?

We know that during the sale, the prices are

generally reduced. How much does a customer

save per teddy?

2 rupees.

And how many teddies are being bought? 13

So, how much does the customer save in

total?

It will be 13 times 2.




35

How will you write the multiplication

equation with an unknown here? Let’s take any

other letter as an unknown.

3 2 b 1 × =

What is the value of ‘b’? ”b” is the total savings made by a

customer in buying 13 teddies.

How will you solve this? Let’s first split the

numbers into tens and ones. Show it on the WB.

I will break 13 into 10 and 3. Total

savings will be 10 ✕ 2 and 3 ✕ 2. Hence

the answer will be 26 rupees.


or on

top right.



Student inputs the answer and clicks on the

check. Moves to the next screen.




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So we know that she saved 26 rupees. How

do we find the paise she saved?

We know that ₹1 = 100 paise. So, she

will save 26 × 100 paise.

How many paise saved? We have learnt that the product of

numbers multiplied by 10 gets one 0 at the

end or unit place. Here we are multiplying

by 100 so the number gets two 0’s at the

end.So, 26 × 100 = 2600.

She saved 2600 paise.




37

Yes. You’re correct.




38

SA- Q5

Susan wants to organise the pens by packing

them in the packets.

84 pens were packed equally into 7 packets.

How many pens were packed in each packet?

How will you find the number of the pens in

each packet? Will you divide or multiply?

Divide.

How do you know? 84 pens are being equally packed in 7

packets. Hence we will use division.

We have to find the number of pens in each

packet. So, that is the unknown here. How will

you write the division equation using a letter as

an unknown? Choose any letter of your choice.

4 m 8 ÷ 7 =

Let’s use place value again. How will we

expand 84?

I will expand 84 into 10 times the

divisor and the remaining.




39

Right. How will you write it as? 84 = 70 + 14

So, how will you calculate this? Instead of dividing the number 84, I

would divide the number 70 and 14 with 7.



or on

top right.



So, what is 84 divided by 7. It is 10 + 2. That is 12.




40

Yes. So, what is the value of “m” in the

division equation ?4 m 8 ÷ 7 =

m = 12.

How many pens will be kept in each packet? 12 pens.

Absolutely right.




41

SA- Q6

A crayon pack has 6 small crayons worth 4

rupees (₹ 4) each and 6 big crayons worth 7

rupees(₹ 7) each. What will be the cost of the

crayon pack?

How will you find the total cost of a crayon

pack?

It will be the sum total of the cost of

the small crayons and the big crayons.

Help me understand this on the WB. Cost of the small crayons will be 6

times 4 and the big crayons will be 6 times

7.

So, what will be the total cost?

It will be 24 + 42 = 66 rupees.




42


or on

top right.



Well done. Student fills the input boxes and clicks on

the CHECK button to move to the next

screen.




43

Susan is very lucky to have you by her side! With

your Math knowledge, she was able to handle

everything The customers are shopping happily

and the shelves also look neat and organized.

The sale is going as planned, thanks to you!

<if the teacher moves to AA1>

The sale is not over yet. Susan and her father

still have to complete a lot of work. The store will

only get busier as the day goes on. Will you

continue to help her?

<if the teacher skips to CA>




44

Mike and Susan haven’t started working on the

main attraction of the sale yet. The tower of

books will make their bookstore incredibly

popular in Mathachussets.

Advanced Activity

Concepts

● (+1) Advanced: Solve multistep word problems that require using the four operations

to solve the equation. (4.OA.A.3)

Advance Activity 1 (5 mins) - FREEBIE TIME!

Optional

● +1 and +2 above the grade level

● Start, only when more than 15 minutes on the clock

● Skip to Create Activity if only 10 minutes left

Q1: Teacher-Led

As the sale progresses, Susan decides to

treat the customers to freebies. She is eager

to know the number of items remaining on

the shelf. Let’s find out!





45

AA1- Q1

Cost of one teddy is ₹2 and that of one toy

train is a quarter of one rupee. What amount of

money should the customers pay for 2 teddies

and 3 toy trains?

Student reads the question aloud.

What is the cost of 1 teddy?

₹2.

What is the price of 2 teddies in paise?

It will be ₹4. This implies

paise00 00 4 × 1 = 4




46

What is the cost of 1 toy train?

1 quarter of one rupee = 25 paise.

What is the price of 3 toy trains in paise?

It will be 3 times 25 paise which is 3

quarters.

How many paise are 3 quarters equal to?

3 times 25.

How will you find out 3 times 25? You know

one way to multiply is also to add the same

number again and again. ?

Repeated addition.

That’s right. Let us add 25 three times to

know what is 3 times 25.

25 + 25 + 25 = 75. Hence, 3 quarters

are equal to 75 paise.

So, what is the price of 2 teddy and 3 toy

trains?

It will be 00 5 75 paise 4 + 7 = 4

That’s right! Which two mathematical

operations did we use in this question?

We used multiplication to convert the

rupees and the quarters of a rupee to paise

and used addition to find the total money

required.




47


or on

top right.






48

Brilliant. Let’s go to the next question.

Student clicks on NEXT button to go to next

screen

Q2: Student-Led




49

AA1- Q2

15 general knowledge books, each worth ₹1,

10 comic books, each worth 1 quarter of one

rupee, and 12 superhero posters, each worth 20

paise have been kept on a shelf. What is the

value of the items on the shelf?

Here, we see that all items have their costs

mentioned in different currency units. So, we

should first convert all these into common

currency units. Which currency unit should we

convert all these to?

paise

It is easier to convert rupees to paise. What

is the cost of 15 general knowledge books in

paise?

Cost of general knowledge books will

be 15 times ₹1 which is ₹15. This is equal

to 15 00 500 paise ₹ × 1 = 1

What is the cost of 10 comic books in paise? Each comic book costs 1 quarter of a

rupee(25 paise). So, 10 books will cost 10

quarters of one rupee. This is

paise.0 5 50 1 × 2 = 2




50

And what is the cost of 12 superhero posters

in paise?

Each superhero poster costs 20 paise.

So, 12 superhero posters will cost

paise.2 0 40 1 × 2 = 2

Right. We have converted all three into

paise. What should we do now?

We should add the costs of general

knowledge books, comic books, and

superhero posters.

What is the total cost? Total cost 500 50 40 990 paise = 1 + 2 + 2 = 1

Student inputs the values and clicks on

CHECK and then clicks NEXT to go to the

next screen.




51

Susan’s customers are really happy with all the

freebies that you distributed.

<skip to CA>

It’s time to create the main attraction of the sale!

Susan and Mike need your knowledge of Math to

build an amazing tower of books!

<moving to AA2>

Many customers are now visiting the store. The

shelves have now become messy after the

customers have picked the items that they

wanted. Let’s see how Susan makes the shelves

look neat!

Advance Activity 2 (5 mins) - MESSY SHELVES

Optional




Many people have visited the store and gone through the shelves while shopping. Susan

notices that the shelves look messy now. She decides to get them packed in a pencil case and

gift bundle.

Q1: Teacher-Led




52

AA2- Q1

A pencil case will have an eraser, 3 pencils,

and a few pens. The price of an eraser and a

pencil is 5 rupees each. If one pen costs 10

rupees, how many pens should Susan put into

the box?

<Press open to get to next page>

What do we have to find here? We have to find the number of pens in

the box.

What is the total sale price of the box? 6 ten rupee coins.

Do we know what items are there in the

box?

Yes. It has an eraser, 3 pencils, and a

few pens.




53

So, what is the price of 1 eraser and 3

pencils put together?

Eraser and pencil are worth 5 rupees

each. So, 1 eraser will cost 1 five rupee

coin and 3 pencils will cost 3 five rupee

coins . So, an eraser and 3 pencils will cost

4 five rupee coins in total.

Let us convert these into total rupees. 4 five rupee coins are equal to 20

rupees.

What is the cost of the pencil case in rupees? 6 ten rupee coins, which is equal to 60

rupees.

An eraser and 3 pencils cost 20 rupees. What

is the remaining amount?

60 - 20= 40 rupees

What is the cost of a pen in rupees? 10 rupees.

So, how many pens will come for 40 rupees?

I will divide 40 by 10 to find this out. It

will be 0 10 4 pens 4 ÷ =




54

Student completes the input boxes and

clicks the NEXT button to go to the next

screen.

Probing question

A customer has 2 hundred rupee notes. If

she purchases 3 such pencil cases, how much

money will she be left with?

How much money does the customer have in

rupees?

How much money will she be left with?

One pencil case costs 60 rupees. So 3

such cases will cost 180 rupees.

2 hundred rupee notes. This equals

200 rupees.

It will be 200 - 180= 20 rupees.




55

This is right. Let’s move to the next question.

Q2: Student-Led

AA2- Q2

A bundle consists of one book worth ₹100,

one pencil is worth 4 ten rupee coins, and gift

cards worth 10 rupees each. For the price of the

bundle to be ₹200, how many gift cards should

be kept in the bundle?

What do we have to find here? We have to find the number of gift

cards in the bundle.

What is the price of the bundle? ₹200.

Do we know what items are there in the

bundle?

Yes. It has a book, a pencil and a few

gift cards.




56

Let us change all the prices to rupees. What

is the price of the book?

100 rupees.

What is the price of the pencil in rupees? 4 Ten rupee coins equals 40 rupees.

What is the price of the book and the pencil

in the bundle?

100 + 40 = 140 rupees

What is the price of the bundle? 200 rupees.

The book and the pencil in the bundle cost

140 rupees. What is the remaining amount?

rupees00 − 140 0 2 = 6

What is the cost of a gift card in paisa? 2 Five rupee coins equals 10 rupees.

So, how many gift cards of 10 rupees each

will come in 60 rupees?

I will divide 60 by 10 to find this out. It

will be 0 10 6 gif t cards 6 ÷ =




57

That’s right.

The shelves look very neat now.

<if the teacher moves to AA3>

Next, Susan has to handle another new task in

the bookstore. What could this be? Let’s find out!

<if the teacher skips to CA>

It’s time to create the main attraction of the sale!

Susan and Mike need your knowledge of math to

build an amazing book tower!

Advance Activity 3 (5 mins) - SUSAN- THE NEW SHOPKEEPER

Optional






58


Mike takes a break to have lunch, so Susan takes his place at the billing counter. She is

taking care of the bills now. However, she’s finding it hard to write down the items

purchased. Let’s help her out!

Q1: Teacher-Led

AA3- Q1

A stationery set contains a pencil, a pen, and

a pack of wax colors. A pencil costs 4 rupees. A

pen costs 8 rupees, and a pack of wax colors

costs 20 rupees. What is the numerical

expression to calculate the cost of 4 such

stationery sets?




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Today we will learn a new concept. It is called

Numerical Expression.

The term numerical expression is made up of two

words, numerical meaning numbers, and

expression meaning phrase. Thus, it is a phrase

involving numbers. It is a mathematical

statement involving only numbers and one or

more operations like addition subtraction

multiplication and division.

Let’s see some numerical expressions on the WB.


or on

top right.



https://www.splashlearn.com/math-vocabulary/number-sense/number

https://www.splashlearn.com/math-vocabulary/number-sense/expression




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Numerical expressions do not contain any “equal

to” sign. Let us understand the parts of the

expression on the WB.


or on top

right.



Ok. Let’s come back to the question now.

What do we have to answer?

What is the numerical expression to

calculate the cost of 4 stationery sets?

What is included in one stationery set? A pencil, a pen, and a pack of wax

colors.

And, we know their prices too. A pencil costs

4 rupees. A pen costs 8 rupees, and a pack of

wax colors costs 20 rupees. So, what is the

It will be 4 + 8 + 20 rupees.




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numerical expression to calculate the cost of one

stationery set?

We now know the cost of one stationery set.

How will we find the cost of 4 such stationery

sets?

Cost of three stationery sets would be

equal to 4 times the cost of one stationery

set.

In a numerical expression, we will put the

cost of one stationery set in brackets. The

bracket is used to group the expression as one.

Can you write the numerical expression to find

the cost of 4 stationery sets?

Yes. It will be 4 times (4+ 8 +20)

rupees.


or on

top right.






62

I see you understand how to write the

numerical expressions now. Let’s go to the next

question.

Q2: Student-Led

AA3- Q2

Susan wants to note down the amount of

money collected from the sale of 325 books, 80

soft toys, and 53 flower pots. If each item was

sold for ₹2, write down the numerical expression

to calculate the total money collected.




63

We know how to write the numerical

expressions now. What expression will you write

first?

I will find out the total number of items

sold.

How many items were sold? It will be 325 + 80 + 53.

That’s correct. Do we know the price at

which these items were sold?

Yes. Each item was sold for ₹2.

So, what is the numerical expression to find

out the total money collected?

It will be 2 ✕ (325 + 80 + 53).

Absolutely right! Well done!




64

Susan was able to handle all the demanding

tasks, thanks to you! Mike returns from his break

and joins Susan. Now they are all set to start

building the book tower.

Create Activity (10-12 mins) - BOOK TOWER

Compulsory

Mike and Susan want the sale to be an

unforgettable experience for the customers. They

create a magnificent book tower that is sure to

grab people’s attention. This will make their

bookstore stand out as the most unique one in

Mathachussets.

A book tower is made by placing books on top of

each other. Stack the books with your knowledge

of math!

Student starts the activity.

Step 1

Susan wants to put the books on different levels

now. Hardbacks will be kept at the bottom and

paperbacks will be kept on upper levels of the

tower. Help her decide that.

Select the number of levels for hardbacks.

(between 3 or 4)




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Step 2 :

Select the number of hardbacks (5/6) and

paperbacks (8/9) on each level and find out the

total numbers and their cost.

How many hardbacks will be there in the

tower?

If the cost of a hardback is 5 rupees, what is

the cost of them all?

How many paperbacks will be there in the

tower?




66

If the cost of a paperback is 2 rupees, what

is the cost of them all?

Step 3

To decorate the book tower, Susan picked some

ribbons and a few stickers.

Susan picked 126 bookmarks. If she sticks

them equally on each level, how many ribbons

will she stick on one level?

Step 4

Susan wants to place a toy train track around the

book tower. She joins tracks to create a big track

which will cover the bottom levels of the tower.

Click on ADD THE TRACK

The book tower is ready for DOWNLOAD!




67

Students who have done any of the advance activities will proceed to the next step. (+1)

Step 5:

To make the tower look attractive, Susan decides

to put a toy on the top of the tower. Drag the toy

onto the top.

Step 6:

What will the numerical expression be if we want

to make 2 such book towers?

Step 7:

Download your book tower.

You did it, <student’s name>!

The tower stands tall. A huge crowd

gathers at the store to take a look at your

wonderful creation! Susan and Mike are

incredibly happy because their bookstore is




68

popular now in Mathachussets. More

importantly, Susan is feeling satisfied

because she was able to support her father

in the time of need.

Student stops screen share

Wrap-Up (3 mins) - ‘Name of the Activity’

Compulsory

● Reflection

● Summary

● Hats off

Can you recollect what you learned today?

Share the Wrap-Up screen with the student.

What was the wow moment in the class for

you?

You did great today!

We learned:

1. to solve word problems involving

rupees and paise using ₹ symbol

appropriately.

2. to solve word problems involving

multiplication and division equations

with a letter as an unknown.

3. to solve problems with more than

one mathematical operation.

Student response.




69

(Give at least 2 hats off)

I’m so glad that you focused throughout the

class. Hats off for strong concentration.

Press the Hats Off icon for Strong

Concentration.

I liked the way you solved division and

multiplication equations with a letter as an

unknown.

Press the Hats Off icon for Creatively Solving

Activities.

All the questions you asked during the class let

me know that you were thinking through the

activities.

Press the Hats Off icon for Great Question

I’m super excited to continue the learning

journey with you! Remember to take the quiz and

complete your worksheets before the next class.

See you soon!

Teacher clicks




70

GeoGebra Links

Activity Activity Name GeoGebra Link

TA The Big Sale Begins! https://www.geogebra.org/m/jprwn8

ue

SA The Sale Continues https://www.geogebra.org/m/wakpy

28k

AA1 Freebie Time! https://www.geogebra.org/m/c2avuc

ts

AA2 Messy shelves! https://www.geogebra.org/m/sf8rsqq

f

AA3 Billing counter https://www.geogebra.org/m/nfdcx6

zn

Create Design a book tower https://www.geogebra.org/m/uwjzd6

s7

Quiz Activity

(post-class)

QA https://www.geogebra.org/m/as5uug

8e

https://www.geogebra.org/m/jprwn8ue

https://www.geogebra.org/m/jprwn8ue

https://www.geogebra.org/m/wakpy28k

https://www.geogebra.org/m/wakpy28k

https://www.geogebra.org/m/c2avucts

https://www.geogebra.org/m/c2avucts

https://www.geogebra.org/m/sf8rsqqf

https://www.geogebra.org/m/sf8rsqqf

https://www.geogebra.org/m/nfdcx6zn

https://www.geogebra.org/m/nfdcx6zn

https://www.geogebra.org/m/uwjzd6s7

https://www.geogebra.org/m/uwjzd6s7

https://www.geogebra.org/m/as5uug8e

https://www.geogebra.org/m/as5uug8e




71

Wrap up Key Learnings https://www.geogebra.org/m/tsecne

bu

Glossary

Word Meaning Image

Billing counter the place in a store where people pay for the

things they buy.

Book tower many books placed on top of each other to

create an attractive design.

Bundle a group of things fastened or held together.

https://www.geogebra.org/m/tsecnebu

https://www.geogebra.org/m/tsecnebu




72

Convert to change something.

Currency a system of money that is used in a particular

country.

Demanding something that needs a lot of time and energy

to complete.

Freebie something that is given for free.

Gift card a card that can be exchanged at a store for

items that are priced within its value.

Hardback a book that has a stiff cover.

Hitch a temporary difficulty that causes a short delay.




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Numerical

expression

a mathematical sentence that has only numbers

and operation symbols.

Paperback a book with a cover made of thick paper.

Sale when many items at a store are sold at a

discount.

Stationery the items that are needed for writing.

Sticky note a small paper that is sticky on one side.




74

Tender to give something.

Wallet a small folding case for carrying money and

bank cards.

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