New
New
Year 1

# Understand that parts can be represented in any order

I know that parts can be combined in any order and can represent this.

New
New
Year 1

# Understand that parts can be represented in any order

I know that parts can be combined in any order and can represent this.

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## Lesson details

### Key learning points

1. When parts of a whole are added together, each part is called an addend.
2. You can combine the parts in any order because they still make the same whole.
3. You can write the addends in any order because, when combined, they still make the same whole.

### Common misconception

Children may believe that addends must be represented in a certain order.

Ensure parts are seen alongside objects and pictures presented in different ways so the visual always matches the given expression.

### Keywords

• Partition - To split a whole up into parts (pieces or sections of the whole).

• Combine - To put parts together to make a whole.

Plan to explore contexts where parts can be reversed and don't initially appear to match visuals so that this can be discussed and corrected. Always ensure precise language is used when describing what each number in the expression represents.
Teacher tip

### 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).

## Starter quiz

### 6 Questions

Q1.
Jacob represents this picture like this, 2 + 3. What does the 3 represent?
the whole group
the cups with juice
Q2.
Picture 3 apples and 3 oranges. Represent this using numerals and the plus sign.
Correct Answer: 3 + 3, 3+3
Q3.
Jacob writes this to represent the picture, 2 + 4. Which part represents the black cats?
2
6
Q4.
There are 4 blue counters and 1 yellow counter. We can represent this as
4 + 0
1 + 5
Q5.
Use numerals and the plus sign to represent this picture.
Correct Answer: 5 + 3, 5+3, 3 + 5, 3+5
Q6.
Which of the following expressions does not represent the picture?
6 + 3
3 + 6
4 + 5

## Exit quiz

### 6 Questions

Q1.
The apples can be partitioned into parts of different colours. Tick the numbers that will complete the stem sentence. is a part.
5
Q2.
Use numerals and the plus sign to write two expressions with the parts 2 and 3.
Correct Answer: 2 + 3, 3 + 2
Q3.
Match each expression to the one that correctly represents the same amount.
Correct Answer:2 + 5 ,5 + 2

5 + 2

Correct Answer:6 + 2,2 + 6

2 + 6

Correct Answer:2 + 3,3 + 2

3 + 2

Q4.
Which expressions can represent this picture?