Question

Kevin has 23 rugby balls. He needs 31 rugby balls.
How many more rugby balls does Kevin need?

Answer 1

8

Explanation:

31 - 23

3 1

-2 3

We cannot do 1 - 3 so take away 1 from 3 (3 - 1) and add a 1 to the 1

2 11

- 2 3

0 8

Your answer is 8.