Post on 26-Jan-2022
S1 (1.1) Decimals.notebook November 29, 2017
Daily Practice 9.10.2017
Q1. Round 88.94 to the nearest unit
Q2. 4 x 7
Q3. 5 (6)
Q4. 20 x 40
Q5. 29.88 + 36.9
Today we will be revising over how to add and subtract decimals.
Adding and subtracting decimals
Always ensure each digit has its correct place value and the number that has the greater value is on top when subtracting.
Examples:
(a) 22.4 + 3.677 (b) 30 - 5.89 (c) 28.1143 - 1.07 + 0.3
Adding and subtracting decimals Adding and subtracting decimals
S1 (1.1) Decimals.notebook November 29, 2017
Daily Practice 10.10.2017
20 questions mental maths
Today we will be practising adding and subtracting decimals.
Daily Practice 12.10.2017
Q1. Find 25% of 70
Q2. Round 81.76 to the nearest unit
Q3. Find 4/7 of 2849
Q4. -9 x 6
Q5. (3 x 2) ÷ -2
Today we will be learning how to multiply decimals.
Recap. of multiplying by 10, 100, 1000
2.3 x 10
S1 (1.1) Decimals.notebook November 29, 2017
Always ensure you have the same amount of digits after the decimal point in your answer as there are in the question
Examples:
(a) 23.45 x 3
(b) 9.645 x 40
Multiplying Decimals Questions:
(a) 45.62 x 5
(b) 812.3 x 4
(c) 2.341 x 3
(d) 9.81 x 7
(e) 111.8 x 30
(f) 821.16 x 200
(g) 45.678 x 90
(h) 1.112 x 500
(i) 3.044 x 6000
(j) 31992.7 x 80
Daily Practice 24.10.2017Q1. 4522 x 90
Q2. Round 8172.5 to the nearest unit
Q3. If 2 x k ‐ 1 = 17, what is k?
Q4. ‐36 ÷ ‐6
Q5. Calculate the perimeter
5.5cm
Today we will be learning how to multiply decimals by decimals.
Multiply like normal and ignore the decimal point. Then ensure that however many digits are after the decimal point in the question, it has to be the same in the answer.
Examples:
(a) 0.4 x 0.2
(b) 0.6 x 0.08
Multiplying decimals by decimals
(c) 0.026 x 0.7
S1 (1.1) Decimals.notebook November 29, 2017
Today we will be learning how to multiply trickier decimals and divide with decimals.
Daily Practice 26.10.2017
Q1.
Find 50% of 26Q2. 32.77 + 1.018
Q4. Write down a prime number between 40 and 50
Q3. 3 x (-4) x (-5)
Q5) 0.2 x 0.03
Today we will be learning to divide with decimals.
Do a step sum and always ensure your decimal point is lined up.
Examples:
(a) 342 ÷5 (b)43.47÷ 9 (c) 0.1824 ÷ 6
Dividing with Decimals
Division QuestionsQ1) 441 ÷ 2
Q2) 3.305 ÷ 5
Q3) 2.97 ÷ 3
Q4) 4018 ÷ 4
Q5) 3031 ÷ 2
Q6) 673.2 ÷ 9
Q7) 10.2 ÷ 6
Q8) 101.5 ÷ 7
Q9) 361.6 ÷ 8
Q10) 5 ÷ 8
Q11) 8.64 ÷ 8
Q12) 2045 ÷ 4
Q13) 250.56 ÷ 2
Q14) 3.75 ÷ 4
Q15) 5.49 ÷ 90
Division QuestionsQ1) 441 ÷ 2
Q2) 3.305 ÷ 5
Q3) 2.97 ÷ 3
Q4) 40.18 ÷ 5
Q5) 303.2 ÷ 2
Q6) 673.2 ÷ 9
Q7) 10.2 ÷ 6
Q8) 101.5 ÷ 7
Q9) 361.6 ÷ 8
Q10) 54.96 ÷ 8
Q11) 8.64 ÷ 8
Q12) 20.45 ÷ 4
Q13) 250.56 ÷ 2
Q14) 1.0812 ÷ 4
Q15) 5.49 ÷ 90
S1 (1.1) Decimals.notebook November 29, 2017
Magic Squares
2
7
What is the magic number?
1
3
4
6 2.4
1.8
4.8
3
Daily Practice 30.10.2017
Q1. 4 x 5 ‐ 2 + 3
Q2. Find 3/7 of 2149
Q3. 17.24 + 1.005
Q4. 0.008 x 0.9
Q5. ‐5 + (‐15)
Today we will be learning to divide decimals by decimals.
To divide a decimal by a decimal, make the denominator a whole number first (by multiplying top and bottom by 10,100 or 1000).
Examples:
(a) 24 ÷ 0.08 (b) 0.18 ÷ 0.9 (c) 0.48 ÷ 0.006
Decimals dividing by decimals
S1 (1.1) Decimals.notebook November 29, 2017
Trickier decimal division
http://www.mathworksheets4kids.com
Trickier decimal division
(a) 0.428 ÷ 0.002 (e) 0.036 ÷ 0.0004
(b) 0.12 ÷ 0.003 (f) 0.2466 ÷ 0.06
(c) 0.065 ÷ 0.5 (g) 0.459 ÷ 0.0009
(d) 0.3224 ÷ 0.8 (h) 0.0497 ÷ 0.07
Daily Practice 31.10.2017
Q1. There were 3788 witches surrounding a giant
cauldron, round to the nearest hundred
Q2. Annie ate 25% of 3000 brains, how many is this?
Q3. 6 - 3 x 5
Q4. 21.45 x 60 Q5. 0.16 ÷ 0.02
Today we will be dividing decimals by decimals and reading decimal scales.
Trickier decimal division
(i) 0.428 ÷ 0.002 (j) 0.036 ÷ 0.0004
(k) 0.12 ÷ 0.003 (l) 0.2466 ÷ 0.06
(m) 0.065 ÷ 0.5 (n) 0.459 ÷ 0.0009
(o) 0.3224 ÷ 0.8 (p) 0.0497 ÷ 0.07
Decimal Scales
1 2
S1 (1.1) Decimals.notebook November 29, 2017
Decimal Scales
22 22.1
Decimal Scales
0 1
Decimal Scales
19 20
1 2 3
12 13
1.5 2
2.5 2.6
0 0.5
(a) (b)
(c) (d)
Rounding Decimals
Rounding a number to the nearest unit (nearest whole number).
H T U . t h th
Examples: Round to the nearest unit
(a) 3.4
(b) 75.182
S1 (1.1) Decimals.notebook November 29, 2017
Round each of these to the nearest unit
(i) 2.6 (ii) 3.22 (iii) 7.95 (iv) 14.715
(v) 18.225 (vi) 157.63 (vii) 44.8177
Daily Practice 2.11.2017Q1. Write two hundred thousand and eighty three in digits
Q2. 6 ‐ 5 x 4
Q3. ‐4 x (‐8)
Q4. 6 ‐ (‐1)
Q5) 0.56 ÷ 0.007
Today we will be continuing to learn to round to decimal places.
Homework due Monday.
Rounding to 1 decimal place
Rounding a number to 1 d.p. means to leave 1 digit after the decimal point.
Examples: Round these to 1 decimal place
(a) 3.24
(b) 1.855
(c) 2411.299
(d) 101.99
Rounding Decimals
Round each of the following to the 1 decimal place
(a) 22.91
(b) 43.24
(c) 2.87
(d) 19.9132
(e) 20.473
(f) 38.129
(g) 43.456
(h) 9.921
(i) 2035.10987 (j) 2.44138 (k) 10.8991
Rounding Decimals
Round each of the following to the 1 decimal place
(a) 22.91
(b) 43.24
(c) 2.87
(d) 19.9132
(e) 20.473
(f) 38.129
(g) 43.456
(h) 9.921
(i) 2035.10987 (j) 2.44138 (k) 10.8991
S1 (1.1) Decimals.notebook November 29, 2017
Round these to 2 decimal places
(c) 41.256 (d) 38.1622
2 decimal places means to leave 2 digits after the decimal point
Today we will be rounding to decimal places using wipe boards.