Multiplication and Division. Multiplication Understand multiplication as repeated addition. There are 5 pencils in one packet, how many pencils in 4 packets?
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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
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
Move onto bigger numbers. 23 x 5 = 20 x 5 = 100 (2 x 5 = 10) 3 x 5 = 15100 + 15 = 100 + 10 + 5 = 115
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
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
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
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