Module 1 Review

Dividing Decimals

100

56.8 ÷ 10²

0.568

200

1.23 ÷ 10³

0.00123

300

6.4 ÷ 8

0.8

400

Miss Moon makes 18.5 liters of slime for PAC night. She needs to put the slime in two different stations. If she puts the same amount of slime in each station, how much slime will be at each station?

Use long division.

9.25

500

The following equations involve different quantities and use different operations, yet produce the same result. Use a place value chart and words to explain why this is true.

5.23 x 10³ = 5230

523000 ÷ 10² = 5230

When I multiplied the digits moved 3 places to the left, because they got larger. When I divided, the digits moved 2 places to the right because they decreased.

Multiplying Decimals

100

8.8 x 10

88

200

7.33 x 10²

733

300

6.2 x 10³

6200

400

3 times 6 tenths

18 tenths = 1.8

500

6 groups of 4 hundredths

24 hundredths = 0.24

Place Value

100

Which digit is in the tenths place?

7.219

2

200

Which digit is in the thousandths place?

5.2169

6

300

Write the sum of 15 +30 in standard form, word form, and expanded form.

45

forty five

40 + 5

400

Write the sum of 6.3 + 0.045 in standard form, word form, and expanded form.

6.345

six and three hundred forty five thousandths

6 + 0.3 + 0.04 + 0.005

500

Use an area model to explain the product of 5.8 and 3. Write the product in standard form, word form, and expanded form.

17.4

seventeen and four tenths

10 + 7 + 0.4

Comparing

100

Compare using >, <, or =.

76.125                         76.124

76.125  >  76.124

200

Compare using >, <, or =.

3 tenths + 8 hundredths                   0.42

3 tenths + 8 hundredths  <  0.42

0.38 < 0.42

300

Compare using >, <, or =.

342 hundredths + 7 tenths             3 + 49 hundredths

342 hundredths + 7 tenths   >    3 + 49 hundredths

4.12  > 3.49

400

Compare using >, <, or =.

0.4 x 10² + 0.008 x 10³                0.4 x 10 + 0.8 x 10²

0.4 x 10² + 0.008 x 10³     <     0.4 x 10 + 0.8 x 10²

48 < 84

500

Compare using >, <, or =.

3 + 21 x (1/10) + 14 x (1/100)

3.224

3 + 21 x (1/10) + 14 x (1/100)  >  3.224

5.24  > 3.224

Rounding

100

Finish the phrase: 5 or more you...

Raise the score

200

Round to the nearest tenth.

12.062

12.1

300

Round to the nearest hundreth.

9.789

9.79

400

Round to the nearest thousandth.

20.3458

20.345

500

Dr. Moon mixed 11.456g of chemical A, 13.078g of chemical B, and 6.507 of chemical C. 

Find the total of the actual amount. Then, find the total rounded amount.

31.041g

31 grams