This KS1 Maths article you will learn how to count within 20 by counting on to and count back from 20. We also have a KS1 Maths quiz and lots of examples.

Counting on to and back from 20 When you count to 20, you start at 1 (or zero) and count on until you reach 20. Each number is one more than the last. When you count back from 20, you start at 20 ...