Multiplication and Division. Multiplication Understand multiplication as repeated addition. There are 5 pencils in one packet, how many pencils in 4 packets?

Multiplication and Division

MultiplicationUnderstand multiplication as repeated addition .

There are 5 pencils in one packet, how many pencils in 4 packets?

5 + 5 + 5 + 5 or 4 lots of 5 or 4 x 5

1packet

2 packets

3packets

4packets

Your turn

• 3 x 6 =

When the children are comfortable with this we move onto repeated

addition on a number line.4 x 5 =

0 5 10 15 20

+5 +5 +5 +5

Your turn

• 6 x 4 =

From this we move onto using partitioning .

13 x 3 =

10 x 3 = 30

3 x 3 = 9

30 +9 = 39

Your turn

14 x 5 =

Move onto bigger numbers. 23 x 5 = 20 x 5 = 100 (2 x 5 = 10) 3 x 5 = 15100 + 15 = 100 + 10 + 5 = 115

Your turn

32 x 3 =

Then we introduce the grid method.

3 x 23 =

3 60 9 =69 x 20 3

Your Turn- 3 x 34 =

x

Progress to vertical expanded recording, multiplying by the most

significant digit first • T U

• 2 3

• x 7

• 1 4 0 (7 x 20)

• 2 1 ( 7 x 3 )

• 1 6 1

Your Turn- 35 x 4 T U

Division

Begin by understanding division as sharing.

When we introduce division with models and images we talk about eggs and baskets.

18 ÷ 3 =

We have 18 eggs and 3 baskets.

66 6

Your turn

36 ÷ 6 =

From this we move onto repeated subtraction.

28 ÷ 4 =

28-4

-4-4-4-4-4-4

24201612840

42 ÷ 7 =

Your Turn

42

Starting to chunk.

124 ÷ 4 =

12410 x 4 =4010 x 4 =4010 x 4 =40

84444

-4

10 10101

0

Answer 31

Your Turn

87 ÷ 3 =

87

Knowing multiplication facts this can be developed further.

138 ÷ 6 =

138

- 10 x 6 = 60

78

- 10 x 6 = 60

18

- 3 x 6 = 18

0

10 10 3

Answer is 23

Your Turn

64 ÷ 4 =

64

Thank you for coming and participating.