In the middle there is a number.
On the left goes the number that is three less.
On the right goes the number that is three more.
The filled-in example below shows the answer.
Example
For parents
What does this exercise practice?
Working in steps of three around a number strengthens flexible adding and subtracting up to twenty.
Common pitfalls
Do not mix up left and right. Less means counting backward, more means counting forward.
How to practice at home
Name a number and work out three less and three more together, for example on the number line.
Related: Neighbor Numbers, Number Line