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Adding Decimals
Subtracting Decimals
Estimate
Word Problems
100

12.2 ___ 12.02

>

100

8.73 + 3.47 =

12.2

100

13.5 - 2.8 = 

10.7

100

Estimate to the nearest whole:

5.69 + 2.35

6 + 2 = 8

100

Two rock samples have masses of 56.24 grams and 8.98 grams. What is the estimated total mass if you round the decimals to the nearest tenth?

56.2 + 9 = 65.2 grams

200

4.74 ____ 12.74

<

200

3.74 + 5.46 =

9.2

200

14.2 - 5.5 = 

8.7

200

Estimate to the tenths place:

22.99 + 3.04

23 + 3.0 = 26

200

Sophie put up three bookshelves in her room. The top shelf is 3.88 feet long, the middle shelf is 2.63 feet long, and the bottom shelf is 4.56 feet long. How much longer is the bottom shelf than the top shelf?

0.68 foot

300

9.8 ____ 9.800

=

300

5.92 + 3.48 = 

9.4

300

40.44 - 34.5 = 

5.94

300

Round to the nearest tenth and add:

25.15 ft , 25.15 ft , 13.62 ft , 13.62 ft

25.2 + 25.2 + 13.6 + 13.6 = 77.6 ft

300

Sophie put up three bookshelves in her room. The top shelf is 3.88 feet long, the middle shelf is 2.63 feet long, and the bottom shelf is 4.56 feet long. What is the combined length of the three bookshelves?

11.07 feet

400

132.45 _____ 123.54

>

400

5.26 + 8.37 = 

13.63

400

$10.00 - $5.92

$4.08

400

Round to the nearest whole number and add:

25.15 ft , 25.15 ft , 13.62 ft , 13.62 ft

25 + 25 + 14 + 14 = 78 ft

400

Ricardo bought a pair of shoes for $55.60 and a hat for $9.78. How much did he spend in all? If he paid with 4 twenty dollar bills, how much change did he get?

Total: $65.38

Change Back: $14.62

500

75.63 ___ 75.630

=

500

3.88 + 2.63 + 4.56 =

11.07

500

24 - 13.29

10.71

500

Estimate to the TENTHS place and add:

$4.28, $21.35, $14.65

4.3 + 21.4 + 14.7 = $40.40

500

Mr. Lee sold 8.6 pounds of apples, Ms. Perry sold 40.44 pounds of apples, Ms. Clearly sold 23.5 pounds of apples and Mr. Jones sold 34.5 pounds of apples at the farmer's market. 

1. Which two people sold the most apples?

2. What is the difference between the amounts these people sold?

1. Ms. Perry and Mr. Jones

2. 5.94 pounds

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