Doubling and halving

The children should be able to recall the doubling and halving facts up to 20 pretty quickly.
If they are still a bit wobbly, then please do practise these little and often...whenever you get a spare minute.


i.e. double 6 is 12
double 7 is 14
double 9 is 18

half of 12 is
half of 16 is

These games will help:
stage 1
stage 2


The children enjoyed testing themselves using this machine:
Doubling and halving machine

When moving onto to doubling and halving 2 digit numbers, we encourage the children to make diamonds. This encourages them to split the number into tens and units, working on one side at a time.


Like this,

   Doubling diamond

Doubling using place value cards

                                     Halving diamond

Here is a good game to practise both. You can change the level of difficulty.

Dartboard doubles and halves

Set the level

When halving, use numbers where both the tens and digits are even. i.e 24, 48, 62 etc. Then move onto odd.