# Use estimation to support accurate calculation

I can use estimation to support accurate calculation

# Use estimation to support accurate calculation

I can use estimation to support accurate calculation

## Slide deck

## Lesson details

### Key learning points

- Use times tables and place value to estimate the product of a 3-digit by a 1-digit multiplication.
- Use expanded short multiplication to multiply a 3-digit by a 1-digit number.
- Use short multiplication to multiply a 3-digit by a 1-digit number.

### Common misconception

Pupils attempt to estimate using approximations that do not allow for quick mental calculation.

Spend time estimating yourself and modelling the simplicity of it. Use estimations regularly to check the magnitude of an answer.

### Keywords

Expanded multiplication - A way of recording the steps of a calculation focusing on partitioning one or more factors and showing partial products.

Short multiplication - A way of recording using columns to set out and calculate a multiplication.

Estimate - To find a value that is close enough to the right answer, usually with some thought or calculation involved.

### 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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## Worksheet

## Starter quiz

### 6 Questions

14

18

63

21

70

## Exit quiz

### 6 Questions

300 < 345 < 400

400 < 443 < 500

600 < 697 < 700

800 < 801 < 900