Question

The boys painted 3/10 of the fence before lunch and 3/5 after lunch. How much of the fence is left to paint?

Answer 1

1/10

Explanation:

3/10 + 3/5

make the 3/5 to 6/10 to make it easier to add

3/10 + 6/10=9/10

and then there is 1/10 left.