You Can Do It!
Round
Mental Math
Estimate
Multiply
100

Round to the greatest place value. 

63

60

bonus x 4!

100

50 x 8

400

bonus x5

100

48 x 3

150

bonus x3!

100

38 x 6 

228

bonus x4!

200

Round to the greatest place value. 

864

900

x4

200

40 x 9 

360


200

317 x 6

1,800

bonus x4!

200

780 x 3

2,340


300

$7.26 x 8

$58.08

x3 bonus!

300

Round to the greatest place value. 

217

200


300

600 x 6

3,600

bonus x3!

300

445 x 3

1,200

bonus x3!

300

955 x 4

3,820

400

A ticket to the basketball game costs $7.45. How much will tickets cots for 5 members of the family to go to the game?

$37.25

x2 bonus!

400

Round to the greatest place value. 

9,367

9,000

400

400 x 4

1,600

bonus x3!

400

2,602 x 4

8,000

bonus x2!

400

9,897 x 9

89,073

bonus x3!

500

James bought a Powerade and 3 pretzels. The drink cost $3.49 and each pretzel costs $1.99. How much money did he spend?

$9.46

bonus x2!

500

Round to the greatest place value. 

950

1,000

x2 bonus!

500

900 x 11

9,900

500

9,867 x 7

70,000

500

7,777 x 7

54,439

M
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