Unit 2 Review

Powers of 10

100

10³ = ?

1,000

200

0.70 x ____ = 7

10¹ or 10

300

____ x 0.003 = 30

10⁴

400

5 x 10³ = ?

5,000

500

0.04 x _____ = 4

10²

Rounding, Comparing, and writing Decimals

100

Compare 45.89 _____ 45.089

>

200

Write this number in standard form: (7 x 1,000) + (3 x 100) + (2 x 10) + (8 x 1/10) + (2 x 1/1000)

7,320.802

300

Compare 3.03 ____ 3.33

<

400

Round 45.259 to the nearest whole number.

45

500

Which of the following round to 2.5: 2.48, 2.42, 2.45, 2.58, 2.52

2.48, 2.45, 2.52

Adding and Subtracting Decimals

100

1.45 + 2.65

4.10

200

23.45 - 12.32

11.13

300

27.1 + 15.81

42.91

400

85.3 - 41.56

43.74

500

500 - 125.26

374.74

Adding and Subtracting Fractions

100

1/3 +1/4

7/12

200

2/3 - 1/5

7/15

300

2/3 + 1/2

7/6 or 1  1/6

400

2  1/4 + 3  2/5

5  13/20

500

5  1/5 - 3  1/2

1  7/10

Word Problems

100

Diana bought 7.77 gallons of orange juice and used 6.07 gallons of it to make popsicles. How much orange juice does Diana have left?

1.70

200

Ellie got a $20 gift card for the craft store. She bought some chalk markers for $8.79, some yarn for $2.69, and some beads for $6.98. What is the value left on Ellie's gift card? 

$1.54

300

Abby eats oatmeal for breakfast every day. She checked her pantry this morning, and realized that she had only 4 2/6 cups of instant oatmeal and 8 1/3 cups of old-fashioned oatmeal. How much oatmeal did Abby have in her pantry?

12  4/6 or 12  2/3

400

A class that saved up to buy 8  2/5 pounds of mixed candy has consumed 4 1/3 pounds of it so far. How much candy is left?

4  1/15

500

Lila's Road Paving Company mixed 7 1/4 tons of cement. They used 2 3/5 tons of the cement to pave a street downtown. How much cement did they have left?

4  13/20