Add three addends efficiently by finding two addends that total 10
I can use my knowledge of number pairs to 10 to add three addends efficiently.
Add three addends efficiently by finding two addends that total 10
I can use my knowledge of number pairs to 10 to add three addends efficiently.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- The order of the addends can change and the sum stays the same.
- When adding three addends, it is efficient to first find two addends that sum to 10
- ___ add ___ is equal to 10 Then, 10 add ___ is equal to ___
Keywords
Addends - Any of the numbers that are added together.
Number pairs - Two numbers that sum to make 10
Efficient - Not wasting time or effort. An efficient strategy is one we can carry out easily.
Common misconception
If children record incorrectly, they could re-add an addend that has already been used to make a pair to 10
Carefully model how to record thinking, rewriting the new equation inclusive of 10 underneath.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
9
7
5
6
8
+ 6
+ 4
+ 2
+ 5
10
12
18
14
16
greater than 10
less than 10
equal to 10
Exit quiz
6 Questions
