# Use efficient addition strategies to calculate

I can identify addition strategies to calculate efficiently.

# Use efficient addition strategies to calculate

I can identify addition strategies to calculate efficiently.

## Lesson details

### Key learning points

- We can use strategies we already know to help us prepare for the addition of two 2-digit numbers.
- It is important to be able to calculate mentally before adding two 2-digit numbers.

### Common misconception

Children may not be able to mentally calculate or identify efficient strategies and so revert to counting on in ones.

Assess use of mental strategies before starting this lesson as it is important to be fluent in using strategies with smaller numbers before working with larger numbers to avoid reverting to inefficient counting strategies.

### Keywords

Calculate - To work out an answer, often by adding or subtracting.

Efficiently - 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

Loading...

## Starter quiz

### 6 Questions

## Exit quiz

### 6 Questions

46 + 4 =

45 + 7 =

43 + 2 =