Double Numbers Below 20

Learn your doubles to 10. If you double a number over ten, it can help to partition.

When you double a number, the answer is always even.

Example 1 => To double 13 =>
Firstly, partition 13 => 10 and 3
We… double 10 = 20
double 3 = 6
then do 20 + 6 = 26

Example 2 => To double 16 =>
Firstly, partition 16 => 10 and 6
We… double 10 = 20
double 6 = 12
then do 20 + 12 = 32

Now try a few practice questions!