Counting back is the preliminary stage before subtracting 'in your head'. These worksheets ask your child to count back from numbers up to 20. At first they will probably use fingers or other maths material to count back, but as they gain confidence they will begin to use other mental methods and begin to know the answers ' off by heart'.

Practise counting back, crossing the tens boundary.

Writing teen numbers and whole tens in words.

Counting back in threes from 2-digit numbers.