Operations with Decimals - Review

Adding Decimals

100

Find the sum of 6.4 and 2.71

9.11

200

Find the sum: 

14.35 + 2.39

16.74

300

5.16 + 2.1 + 12.838

20.098

400

John bought 2.64 pounds of broccoli and 3.95 pounds of carrots so his mom could make stir fry for dinner. What was the total weight of his purchase?

6.59 pounds

500

Solve for x: 

12.056 + x = 21.8

x = 9.744

Subtracting Decimals

100

Explain how you can use the "count down" method to solve the following problem, then state the answer:

 9.45 - 1.32

8.13

200

Explain how you can use the "count up" strategy to solve the following problem, then state the answer:

4 - 1.93

2.07

300

Explain how you can use the "elephant trunk" method to solve the following problem, then state the answer:

6.44 - 1.95

Move both numbers up 0.05 to make the subtrahend a whole number (2)

4.49

400

At lunch, your meal costs $6.35 and your friend's meal costs $5.95. If you pay with $15, how much change will you receive?

$2.70

500

x - 43.209 = 12.13

x = 55.339

Powers of 10

100

3.25 x 10

32.5

200

1.25 / 100

0.0125

300

31.2 x 1000

31,200

400

1234/1000

1.234

500

3.002*10^2

300.2

Multiplying Decimals

100

Find the product: 6.2(3)

18.6

200

0.4(3.9)

1.56

300

3.251*2.6

8.4526

400

7.2(15.6)

112.32

500

Kenyan bought 3.4 pounds of nails for his construction job. Each pound cost $1.59. How much did he pay for the nails? Round to the nearest cent.

$5.41

Dividing Decimals

100

Find the quotient: 29.6 / 8

3.7

200

Calculate: 42.4 / 3.2

13.25

300

10.64 / 5.6

1.9

400

!!!DAILY DOUBLE!!!

Calculate the mean (average) of the following set:

3, 6, 10, 8, 9

7.2

500

Shawna bought 2.8 pounds of bananas for $1.68. How much did the bananas cost per pound?

$0.60

Mixed Review

100

Ethan participates in a triathlon. It includes swimming, biking, and running. The swim is 0.8 miles. The bike is 12.25 miles. The entire triathlon is 16.17 miles. How long is the running portion?

3.12 miles

200

!!!DAILY DOUBLE!!!

A local news station hosted a three-day fundraiser for flood victims after a winter storm. On the first day the received $1,405.62. On the second day they collected $912.44. They want to raise a total of $3000 for the whole fundraiser. How much do they need to raise on the third day?

$681.94

300

The price tag below the 8.5 ounce box of crackers at the grocery store says the crackers are $0.28 per ounce. How much does the box of crackers cost?

$2.38

400

Jed bought 3.6 pounds of pears for $5.22. What was the cost of the pears per pound?

$1.45 per pound

500

Find the mean: 4.5, 3.2, 4.7, 4.8, 3.5, 3.75

4.075