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Adding Decimals
Subtracting Decimals
Multiplying Decimals
Word Problems
100

True or False.

When adding and subtracting decimals, you line up your numbers.

False

100

26.43 + 7.19

33.62

100

1.23-1.11

0.12

100

.24 x .7

.168

100

Liam bought a notebook for $2.45 and a pen for $1.35. How much did he spend in total?

$3.80

200

When adding or subtracting decimals, I need to ______ my decimal. 

line up

200

8.009 + 6.5

14.509

200

5.23-0.1

5.13

200

0.85 x 0.02

.017

200

A smoothie costs $4.25 and a sandwich costs $6.75. What is the total cost of lunch?

$11.00

300

True or False

You can change the order of the decimals when subtracting. 

False

300

0.79 +0.45

1.24

300

27.81-5.62

22.19

300

.22 x .44

.0968

300

A gas tank holds 12.5 gallons. After a trip, it has 8.75 gallons left. How much gas was used?

3.75 gallons

400

When adding and subtracting decimals, you count the numbers/spaces behind the decimals to see where the decimal goes in your answer.

False! That's for multiplying!

400

17.82 + 3.66

21.48

400

8.613 -7.258

1.355

400

6.32 x 3

18.96

400

Ms. Jasinski goes to the store. She buys a book for $8.50, a poster for $3.45, and an eraser for $0.70. How much did Ms. Jasinski spend?

$12.65

500

A video is 9.5 minutes long. You’ve watched 7.25 minutes. How much is left to watch?

2.25 minutes

500

111.7 + 102.81

214.51

500

105.65-62.33

43.32

500

67.2 x 3.9

262.08

500

A rope is 15.6 meters long. After cutting off 9.85 meters, how much rope is left?

5.75 meters