Add three addends efficiently
I can add three addends efficiently.
Add three addends efficiently
I can 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 be changed to make the addition easier
- The sum will be the same whichever pair of addends we add first.
- Finding a known fact or double to add first can be more efficient.
- Strategies used to be efficient might be different for everyone.
Keywords
Addends - Any of the numbers that are added together.
Efficient - Not wasting time or effort. An efficient strategy is one we can carry out easily.
Strategy - A plan or method to achieve a specific goal.
Common misconception
Children unable to understand that addends can be swapped but the sum will remain the same.
Use a number line to explore commutativity in a situation where it looks less obvious as this will show children the different structures but also different starting pints but the end pint will remain the same.
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
Loading...
Starter quiz
6 Questions
less than 10
equal to 10
greater than 10
+ 7
+ 5
+ 3
+ 1
12
8
6
10
5 + 3 = 8
8 + 1 = 9
5 + 5 = 10
4 + 7 = 11
Exit quiz
6 Questions
8 + 2 = 10
5 + 5 = 10
6 + 4 = 10
8
10
11
9