# Use number facts to solve addition and subtraction problems.

I can use number facts to solve addition and subtraction problems.

# Use number facts to solve addition and subtraction problems.

I can use number facts to solve addition and subtraction problems.

## Lesson details

### Key learning points

- Known facts can be used to help find new facts efficiently.
- Known facts can be used to solve addition and subtraction problems.
- Bar models can be drawn to help represent and understand problems.

### Common misconception

Children may have difficulty knowing which operation is required to solve a problem, particularly in those involving finding the difference.

Encourage children to draw bar models or part-part-whole models to support their understanding of the structure of the problem and to articulate their thinking (as modelled in the lesson).

### Keywords

Efficiently - Not wasting time or effort. An efficient strategy is one we can carry out easily.

Whole - All of something. Complete.

Part - A piece or section of a 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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## Starter quiz

### 6 Questions

35 - 2 = 33

97 - 4 = 93

33 - 2 = 31