Multiplication and division

Factors and multiples

100

List all the factors of 20

1, 20, 2, 10, 4, 5

200

List the first 5 multiples of 6

12, 18, 24, 30, 36, 42

300

What is the highest common factor of 24 and 36?

12

400

solve 45 ÷ 9 using factors 

45 ÷ 3 ÷ 3

15 ÷ 3 = 5

500

List all the factors of 45

1, 45, 3, 15, 5, 9

Multiply and Divide by 10, 100, 1000

100

500 ÷ 100

5

200

45 x 10

450

300

7.5 x 100

750

400

35.2 ÷ 100

0.352

500

0.04 x 100

4

Division Strategies

100

Solve 84 ÷ 4 using the halving strategy

84 ÷ 2 = 42 ÷ 2 = 21 

200

Solve 77 ÷ 5 using the round and divide strategy. 

75 ÷ 5 = 15 r 2

300

Use the algorithm to solve 169 ÷ 5 

33 r 4

33.8

400

Use the split strategy to solve 420 ÷ 3 

(you can split the number 420 any way that makes it easier to solve!)

300 ÷ 3 = 100

120 ÷ 3 = 40

420 ÷ 3 = 140

500

Use ratios to solve 35000 ÷ 5000

35 ÷ 5 = 7

Multiplication strategies

100

Use doubling strategy to solve 23 x 4

23 x 2 = 46 x 2 = 92

200

Use drop the zero add, the zero to solve 420 x 200

42 x 2 = 84

add the zeros 84,000

300

Solve 18 x 5 using the compensation strategy 

20 x 5 = 100 - 5 - 5 = 90

400

Use factors to solve 50 x 28

50 x 4 x 7

50 x 4 = 200 x 7 = 1400

500

Choose the best strategy you know to solve the problem and show your working out. 

130 x 40 =

5200

BODMAS and powers

100

7 x 5 + 20 ÷ 2

45

200

10² = 

100

300

8 - 4 + 2 x 10 + 12 = 

36

400

4⁴ = 

256

500

10 - 2 x 4 + 5³ + (3 x 4) - 10 =

129