Marcus had 15 candy bars.
He gave 5 to his friend, Jack.
He ate 3 of them after dinner.
How many candy bars did Marcus have then?

7 children were waiting in line to see the magic show.
8 more children came.
5 children left to buy popcorn.
How many children were standing in line then?

Sarah had 18 cents.
She bought a lollipop for 5 cents and gum for 8 cents.
How much money did Sarah have then?

Today is Jaclyn's birthday.
She got 5 cards from friends at school.
3 cards came in the mail.
She got 8 more cards from her family.
How many cards did Jaclyn get for her birthday?

Kyle built 9 towers with his blocks.
His younger brother knocked down 2 of them by accident.
Kyle's friend came over and together they built 4 more towers.
How many towers did Kyle have then?