Rounding
X Multiples of 10
/ Multiples of 10
X Decimals
Estimating
100

Round to nearest tens

23.8

20

100

45.8 X 10

458

100

5.32 / 10

.532

100

2.3 x 1.5

3.45

100

2.3 x 1.5

4

200

Round to nearest tens

34.9

30

200

932.17 X 1,000

932,170

200

54.2 / 100

.542

200

20 X 3.6

72

200

20 X 3.6

80

300

Round to the nearest ones

3.1

3

300

.814 X 10

8.14

300

1,067 / 100

10.67

300

3 x 3.4

10.2

300

3 x 3.4

9

400

Round to the nearest hundred

341.8

300

400

7.303 X 10,000

73,030

400

40,342.7 / 100

403.427

400

7.7 x 3.9

30.03

400

7.7 x 3.9

32

500

round to the nearest thousand

6,831.9

7,000

500

.482 X 1,000,000

482,000

500

54.2 / 1,000

.0542

500

37.2 x 8.3

308.76

500

37.2 x 8.3

320

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