Finding 10 more than and 10 less than a 2-digit number is an important step towards being able to calculate with all 2-digit numbers. Once children are confident with adding or subtracting 10 they can move on to working with multiples of 10. Schools use base 10, rekenreks, number squares and number tracks to illustrate what is happening when adding or subtracting multiples of 10.

Our latest pages use all the above aids to help children with adding and subtracting multiples of 10. Take a look now.