Shane sells golf balls.
He sold 4 to Jack and 5 to Doug.
He had 7 golf balls left.
How many golf balls did Shane have at first?

Bridget borrowed 14 books from the library.
She returned 8 books and borrowed 4 more.
How many books did Bridget have then?

16 children are in the school play.
7 are playing bumble bees and 4 are playing flowers.
The rest are playing trees.
How many children are playing trees?

If our class makes 18 posters, we will get a pizza party.
Catherine made 4 posters.
Matthew made 6 posters.
How many more posters does the class need to make?

Jack has 6 balloons.
Sharon has 5 balloons.
Travis has 4 balloons.
How many balloons do they have in all?