Detectives

Classroom

100

The class should have 20 pencils. Some pencils were stolen, and there were 12 left. How many pencils were stolen?

8

200

The class should have 26 rulers. Some rulers were broken, and there were 12 left. How many were broken?

14

300

Mrs. Moss should have 36 books. Students took some books back to their class, and there were 13 left. How many books are gone?

23

400

The class had 30 calculators. Some stopped working, and there was 18 left. How many calculators stopped working?

12

500

The class had 96 pencils at the beginning of the year. Some have disappeared, and now there is 68 pencils. How many have disappeared?

28

Random

100

The penguin had 13 fish. He ate some, and now has 6 left. How many fish did he eat?

7

200

Ronnie has 9 green balloons. He had some red balloons. He has 12 balloons altogether. How many red balloons does he have?

3

300

There are 15 kids at the party. 7 ate cake. The rest ate ice cream. How many kids at ice cream?

8

400

My mom brought 20 cupcakes for class. 10 of them were chocolate and the rest were vanilla. How many were vanilla?

10

500

Jack earned 9 stickers this week. 4 of them were stars and the rest were smiley faces. How many were smiley faces?

5