Name:    Lesson 7: Subtracting Decimals by Regrouping

1.

Connor’s mass from when he was born until his first birthday is shown in the graph below.

How much mass did Connor gain in 12 months?
 a. 8.22 kg b. 7.88 kg c. 8.88 kg d. 6.28 kg

2.

 Ones . Tenths Hundredths Thousandths

This model shows 4.021. How would you regroup this model to subtract 1.463?
 a. 4 ones, 10 tenths, 12 hundredths, and 11 thousandths b. 3 ones, 9 tenths, 11 hundredths, and 11 thousandths c. 3 ones, 10 tenths, 12 hundredths, and 11 thousandths d. 4 ones, 9 tenths, 11 hundredths, and 11 thousandths

3.

Laurel’s times for two races were 13.216 seconds and 13.379 seconds. What is the difference in her times for the two races?
 a. 0.129 seconds b. 0.219 seconds c. 0.163 seconds d. 0.229 seconds

4.

Alan ran 2.148 km and Carl ran 2.632 km. How much farther did Carl run?
 a. 0.484 km b. 0.384 km c. 0.584 km d. 0.494 km

5.

Steven is travelling from Regina to Moose Jaw, a distance of 74.6 km. If he has already travelled 57.8 km, how much farther does he have to travel?
 a. 17.8 km b. 17.4 km c. 16.8 km d. 15.8 km

6.

12.083 - 9.837
 a. 2.356 b. 2.247 c. 2.256 d. 2.246

7.

20 - 6.38
 a. 13.68 b. 13.62 c. 14.62 d. 14.78

8.

35.52 - 27.94
 a. 8.58 b. 7.48 c. 8.42 d. 7.58

9.

A container holds 20 kg of soil. If the container already has 16.35 kg of soil in it, how much more soil is needed to fill it?
 a. 3.65 kg b. 4.65 kg c. 3.75 kg d. 4.75 kg

10.

A container holds 4 L of juice. If 2.74 L of juice is used, how much is left in the container?
 a. 1.36 L b. 2.36 L c. 1.26 L d. 2.26 L