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
Loading...
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