# Find a missing part when one part and the whole is known

I can find the missing part when the other part and the whole is known.

# Find a missing part when one part and the whole is known

I can find the missing part when the other part and the whole is known.

## Lesson details

### Key learning points

- Each of the numbers one to five can be partitioned into two or more parts.
- If one part is known, the other part can be found.
- Know what to do when the known part is zero or the missing part is zero.

### Common misconception

Children may add the whole and one part to find the missing part.

Encourage the use of the stem sentence ___ is the whole, ___ is a part and ___ is a part, to reinforce what the numbers represent.

### Keywords

Partition - Partition means to split up a whole into parts.

Part-part-whole model - A part-part-whole model is a pictorial representation that shows the whole and its parts.

Missing part - A missing part means one of the parts that cannot be seen.

### 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).

## Video

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