Unit 3 Review

Rounding

100

Round 12.6 to the nearest whole number.

13

200

Round 3.46 to the nearest tenth.

3.5

300

Round 18.927 to the nearest hundredth.

18.93

400

Round 0.2049 to the nearest thousandth

0.205

500

Round 6.73951 to the nearest ten-thousandth.

6.7395

Find the Sum

100

6.45 + 2.39

8.84

200

8.63 + 5.47

14.10

300

12.7 + 8.56

21.26

400

45.32 + 19.8

65.12

500

7.005 + 4.89

11.895

Expanded Form

100

(3×1)+(4×1/10)+(2×1/100)

3.42

200

(4×1)+(7×1/10)+(3×1/100)+(9×1/1000)

 

4.739

300

Write this number in standard form:
nine and forty-two thousandths

9.042

400

(8×10)+(1×1)+(6×1/100)+(2×1/1000)

81.062

500

Write this number in standard form:
three hundred twelve and seven hundred nine thousandths

312.709

Find the Difference

100

2.5 − 1.2

1.3

200

7.85 − 3.42

4.43

300

9.3 − 4.58

4.72

400

12.6 − 8.37

4.23

500

5.004 − 2.789

2.215