# Understanding commutativity

## Lesson details

### Key learning points

1. In this lesson, we will explore commutativity - the concept that parts in addition equations can be added together in any order.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 3 Questions

Q1.
In the picture there are 5 orange fish and 4 blue fish. Which equation could we use to represent this?
3 + 4 =7
4 + 4 = 8
Correct answer: 5 + 4 = 9
5 + 5 = 10
Q2.
In the picture 5 sheep are in the field, 2 are outside the field. Which equation could we use to represent this?
4 + 2 = 6
4 + 5 = 9
Correct answer: 5 + 2 = 7
5 + 3 = 8
Q3.
I have 3 green apples and 2 red apples. How could I represent my apples as an addition equation?
2 + 1 = 3
2 + 5 = 7
Correct answer: 3 + 2 = 5
3 + 3 = 6

## Exit quiz

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### 3 Questions

Q1.
Choose the most efficient way to add eight and two together.
Option 2
Q2.
Choose the equation that is equal to 4 + 2
2 + 1