Lucy rode the merry-go-round 7 times
yesterday and 8 times today.
How many times did she ride the merry-go-round altogether?

David has 13 balloons.
Amy has 7 balloons.
How many more balloons does David have than Amy?

There are 15 different rides at the fair.
Erica has tried 6 of them.
How many more rides does Erica have left to try?

The petting zoo costs 14 tickets.
Manny has 6 tickets.
How many more tickets does Manny need?

Ed won 7 prizes at the coin toss booth.
He won 3 prizes at the basketball booth.
How many prizes did Ed win in all?