Adding Integers

What is a Rule?• In your DO NOW section, answer the following

questions:– What is a rule that you have to follow at home?– What is a rule in math?– Why are rules important?– Create a definition for the word rule.– If you could create a rule, what would it be and

why?

Learning Essential Question

• How can I add positive and negative integers?

Today’s Announcements

• Happy Halloween!

• Tonight’s homework: Complete worksheet

• Remember: 2nd Marking Period starts this week! Let’s all start out with A’s!

Unit 3’s Bank Account

• During this unit we are going to practice balancing a checkbook!

• This ledger should be put in your class notes section of your binder. You will need it every day for the next 3 weeks!

• Your ledger will be collected at the end of the unit and graded

Unit 3’s Bank Account

• You have been paid $1000 for coming to class today!

• Look out for this man:– When you see him, that means we are making a transaction, and we need to update our ledger

Unit 3’s Bank Account Vocabulary

• Deposit (+): when you put money into the bank

• Withdrawal (-): when you take money out of the bank. When you spend money.

Adding on a Numberline• Start on the first number.• If the second number is positive, move that

many times to the right.• If the second number is negative, move that

many times to the left.

3 + 5

Happy Halloween!• You decide to order a

costume online• The costume cost $36.55.

There is also a $4.75 shipping fee

• Is this a withdrawal or deposit

-4 + -5

5 + 3

-8 + 0

Time for a new winter coat…

• What’s with the weather lately? Its FREEZING!

• You go to the mall to buy a new winter jacket.

• The jacket cost $89.35

• Is this a withdrawal or deposit

-2 + -7

Integer Football• Group Practicewww.mathgoodies.com/games/integer_game/football.html

We will play for 7 minutes- Come up with the answers at your table

Organizer• Create the following Organizer: Today we are

going to fill out the LEFT sideAdding Negatives Adding One Negative

and Positive

What is our Rule?

9 + 4 = 138 + 7 = 156 + 3 = 9

-9 + -4 = -13-8 + -7 = -15-6 + -3 = -9

What is the same about the 2 boxes? What is different?

ADDING 2 NEGATIVE NUMBERS

• RULE:

-8 + -2-3 + -6

ADDING NEGATIVE NUMBERS

• Copy the following questions underneath your notes AND SOLVE:

-6 + -4-4 + -5-5 + -9

It’s Your Lucky Day

• When you were walking home from school you found $8 on the ground.

• Will you deposit the $8

or withdrawal the $8?

• Update your ledger!

Independent Practice• Take out a piece of paper and divide it into 4 sections.

Number it like you see below.

Did you know the way this is number is the way a coordinate graph’s quadrants are labeled?

2 1

3 4

Independent Practice

• Inside your envelope you will find 4 practice problems.

• Each group member must solve ALL 4 practice problems and put them in the correct spot on their papers.

• This will be handed in before leaving the classroom

What could the rule be when you have one negative number and one positive?

-9 + 6 = -35 + -3 = 2-8 + 7 = -14 + -6 = -2

ADDING 1 NEGATIVE NUMBER and 1 POSITIVE NUMBER

• RULE:

8 + -23 + -6

ADDING 1 NEGATIVE NUMBER and 1 POSITIVE NUMBER

• Copy the following questions underneath your notes AND SOLVE:

6 + -7-4 + 85 + -9

PICK A SIDE!• Directions:– One student in your pair will be given a card. – Both will solve the card. BUT DON’T TELL YOUR

PARTNER YOUR ANSWER!! – When I say, the partner with the card will come up

and stand on the correct side. Positive answers will stand on the right side, negative numbers on the left side.

– When everyone’s up, the other partner will check to see if their partner is correct.

– If the partner isn’t correct, partner sitting down gets to switch places with them.

PICK A SIDE!

NEGATIVEPOSITIVE

Independent Practice

• Answer Question A on page 24 in Accentuating the Negative in the textbook.

• ALL Questions!!!• Remember: Teach everyone in the group!

Participation is about how you work together!

Summarizer!• On the Sticky Note that you have, answer the

following question:– Why is the rule for integers important and what

would happen if we didn’t have these rules?