Let's count in 10s. You can count in 10s using a number line. This number line starts at 0 and ends at 90. The numbers go up in units of 10. Let's use this number line to count in 10s to work out ...

Skip counting is a useful skill if you need ... When you count in tens you could use a number line such as this. You could also look at a hundred square. Do you see a pattern?