Multiplication
Addition
Subtraction
Rounding
Fractions
100

6 x 7 =

42

100

   485

+ 230

715

100

   485

- 230

255

100

Round 1,268 to the nearest 10

1,270

100

Peter bought 8 hamburgers for his party. At the end of the party 3 hamburgers were left. What fraction of the hamburgers were eaten?

3 eighths or 3/8

200

8 x 4 = 

32

200

   350

+ 128

478

200

   763

- 220

543

200

Round 1,369 to the nearest 100

1,400

200

Cameron ate 3 slices of pizza. Samantha ate 2 slices of pizza. There are 8 slices in a pizza pie. What fraction of the pizza did Samantha eat?

2 eights or 2/8

300

7 x 9 =

63

300

   763

+ 220

983

300

   502

- 349

153

300

Round 4,386 to the nearest 10

4,390

300

Jeanne had 24 dollars. She spent 9 dollars. What fraction of money does she have left

15/24

(24 - 9 = 15)

400

6 x 9 =

54

400

   502

+ 349

851

400

   521

- 218

303

400

Round 7,357 to the nearest 100

7,400

400

Mrs. Chavez brought 40 cookies to school. Mrs. Chavez's class ate half of the cookies. Ms. Veintimilla's class ate 12 cookies. What fraction of the cookies are left?

8/40

(40 divided by 2 = 20)

(20 - 12 = 8)

(8 out of 40 cookies are left.)

500

8 x 9 = 

72

500

   808

+ 145

953

500

   931

- 658

273

500

Round 9,989 to the nearest 100

10,000

500

In our class there are 20 students. 3 students left to use the bathroom. 2 students are at the nurse's office. 1 student went to fill up their water bottle. 1 student went home. What fraction of the students remain in the class?

7/20

(3 + 2 + 1 + 1 = 7 students left)

(7 out of 20 students left)