# Relate finding half of a number to halving and doubling

I can explain how finding half of a number relates to halving and doubling.

# Relate finding half of a number to halving and doubling

I can explain how finding half of a number relates to halving and doubling.

## Lesson details

### Key learning points

- To find half of a number you split it into 2 equal parts
- Use knowledge of doubles and halves to find half of a number
- If you double the half you will end up with the whole number

### Common misconception

Children may find it difficult to find the whole when they are told the size of the half and may try to find half of the half.

Use a bar model representation to help children see the structure of double and half. Use gesture, colour and/or circling when discussing what each part of the bar model represents.

### Keywords

Double - To become twice as many.

Half - To divide into 2 equal parts.

### 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

2 + 2 = 4 -

Double 2 is 4

8 = 4 + 4 -

Double 4 is 8

3 + 3 = 6 -

Double 3 is 6

10 = 5 + 5 -

Double 5 is 10

$$ \frac{1}{2} $$ -

is one of two equal parts.

$$ \frac{1}{3} $$ -

is one of three equal parts.

$$ \frac{1}{4} $$ -

is one of four equal parts.

A -

$$ \frac{1}{4} $$

B -

$$ \frac{1}{2} $$

C -

$$ \frac{1}{3} $$

$$ \frac{1}{2} $$ of 6 = -

3

$$ \frac{1}{2} $$ of 12 = -

6

$$ \frac{1}{2} $$ of 16 = -

8

$$ \frac{1}{2} $$ of 14 = -

7

$$ \frac{1}{2} $$ of 8 = -

4

## Exit quiz

### 6 Questions

Double 10 is -

20

Double 6 is -

12

Double 7 is -

14

Double 8 is -

16

Double 9 is -

18

Double 3 is 6 -

Half of 6 is 3

Double 6 is 12 -

Half of 12 is 6

Double 5 is 10 -

Half of 10 is 5

Double 10 is 20 -

Half of 20 is 10