More mental arithmetic, doubling and halving multiples of 5. Should be a whizz if you are good at doubling!

Today, we'll explore doubling. Doubling means having the same amount again. To double a number, you add the same number to itself.

Halving and doubling word problems.

Ten questions all about doubling numbers.

More word problems, mostly using knowledge of doubling and halving with larger numbers.

Doubling is coming up again. This time it's all multiples of 5. (Just remember that double 5 is 10.)

Doubling and halving is still a powerful way to work out answers mentally.

Doubling 2-digit numbers and halving 3-digit numbers mentally.

Some people like to start doubling with the units, others like to start with the tens. It doesn?t matter as long as the method is fast and accurate.

More work on doubling and halving, including larger numbers and fractions.

Using tables knowledge and doubling to multiply by 12, 24, 18 etc.

A set of mental arithmetic questions aimed at multiplying numbers by 4 by doubling twice.

Maths Worksheets

Maths Games