It took Joey 14 minutes to finish his homeork.
It took Leo 9 minutes to finish his homework.
How much longer did it take Joey?

16 people entered the chess contest.
7 of them lost during the first round.
How many people won?

Tina had 10 balloons.
She gave 7 of them away.
How many balloons did Tina have then?

Luisa solved 7 addition problems and 8 subtraction problems.
How many math problems did Luisa solve altogether?

8 students came to Mr. Watkin's karate class.
4 students were absent.
How many students does Mr. Watkins have altogether?