# Solve subtraction problems using knowledge of 10 and a bit

I can solve subtraction problems using knowledge of 10 and a bit in different contexts.

# Solve subtraction problems using knowledge of 10 and a bit

I can solve subtraction problems using knowledge of 10 and a bit in different contexts.

## Slide deck

## Lesson details

### Key learning points

- The teens numbers can be represented as ten and a bit.
- We can solve addition and subtraction problems with the ones part or tens part missing.
- A part-part whole model can help to represent the missing whole or missing parts.

### Common misconception

Pupils do not connect a known partition of a teen number e.g. 16 is 1 ten and 6 ones to a subtraction or addition context and therefore use a less efficient strategy.

Practical experiences using a group of 10 and ones are key to supporting understanding that the partitioning structure can work for different contexts.

### Keywords

Partition - The act of splitting an object or value down into smaller parts.

Whole - All of a group or number.

Part - A piece or section of the whole.

### 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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