Decimal Operations (Unit 6)

Estimations

100

Write an estimation for the problem: 

2.4 / 0.8

2 / 1 = 2

200

Write an estimation: 

13.6 / 4

12 / 4 = 3

300

Write an estiamtion: 

8.7 x 1.9

9 x 2 = 18

400

Write an estimation:

12.9 x 8.6

12 x 10 = 120

500

Write an estimation: 

324.5 / 8.4

320 / 8 = 40

Decimal Division

100

2.4 / 0.8

3

200

13.6 / 4

3.4 

300

35.4 / 6

5.9

400

58.8 / 12

4.9

500

133.5 / 15

8.9

Word Problems

100

RJ wants to buy goodies for his 4 sisters for their Easter baskets. He decides he wants to spend $15.95 per sister. How much will he spend?

$63.80

200

Julius needs 23 avocados for guacamole for a party he is hosting. Each avocado costs $1.45.  How much will he spend?

$33.35

300

Rebecca needs 4 cubic feet of concrete for a project at her house. She has 4.5 bags. Each bag makes 0.62 cubic feet. How much can she make from the bags she has? Does she need to go to Lowes for another bag?

2.79

Yes she needs to go to Lowes

400

Myself and two friends ordered pizza last night. The total bill was $25.68. How much money did each of us pay if we split the bill?

$8.56

500

A relay race lasts 12.72 miles. There are 4 runners on the relay team. If each runner runs the exact same distance, how many miles does each team member run during the race?

3.18 miles

Multiplying with Decimals

100

Multiply: 1.8 x 25

45.0

200

Multiply: 5.2 x 1.2

6.24

300

Multiply: 8.7 x 1.9

16.53

400

Multiply: 0.74 x 3.7

2.738

500

Multiply: 12.9 x 8.6

110.94

Multiply and Divide by Powers of 10

100

Multiply: 2.37 x 10²

237.

200

Divide: 450 / 10³

0.45

300

Multiply: 35.9 x 10²

3,590.0

400

Multiply: 1.64 x 10⁴

16,400.

500

Divide: 75,000 / 10⁴

7.5