# Solve problems involving the addition of two-digit numbers

I can solve problems involving addition of two-digit numbers.

# Solve problems involving the addition of two-digit numbers

I can solve problems involving addition of two-digit numbers.

## Lesson details

### Key learning points

- Partitioning the addends can help us to solve problems involving two-digit numbers.
- Once we have written the equation, we must think carefully about the most efficient strategy to use.
- It is important to be able to calculate mentally before adding two 2-digit numbers.

### Common misconception

When the amount of processing required for a task increases, children often default to inefficient strategies such as counting in ones if the use of efficient strategies are not yet automatic.

When solving problems, continue to focus upon, and discuss, the most efficient strategies to use to ensure that this thinking becomes automatic.

### Keywords

Partition - To split a whole up into parts.

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

### 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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