Belle collected 97 animal stickers.
Carolyn collected 18 fewer stickers than Belle.
How many stickers did Carolyn collect?

Peter had 33 marbles in his pocket.
He lost some when he went outside to play.
Now he only has 18 marbles.
How many marbles did Peter lose?

Mikayla has a huge collection of music CDs.
She gave 15 CDs to her friend.
Now she has 78 CDs left.
How many CDs were in Mikayla's collection at first?

Vincent has learned the words to 56 songs.
He learned 18 more songs at summer camp.
How many songs does Vincent know now?

There are 28 students in Mrs. Riley's class but she only has 19 pencils.
How many more pencils does Mrs. Riley need?