Add/Subtract Decimals
Rounding
Estimate
Property
Word Problems
100

  0.85 + 0.15= ? 

1.00 or 1

100

Round to the nearest whole number.

8.54

9 or 9.0

100

   17.25

-  11.79

___________

5

100

What property is this?

13 + 5 = 18

5 + 13 = 18

Commutative Property

100

Amy had yarn that was 6.2 meters long. She used some and now has 1.45 meters. How much did she use? 


4.75 meters

200
   3.45 - 1.23 = ?

2.22

200

Round to the nearest tenth. 

9.63

9.6

200

   8.90

+ 5.80

____________

15

200

What property is this?

(3 + 1) + 5

3 + (1 + 5)

Associative Property

200

Patrick ran 53 meters away from Marty and then ran 16.02 meters directly back towards him. How far was Patrick from Marty then? 

36.98 meters

300

15 + 10.40 = ?

25.4 or 25.40

300

Round to the nearest tenth.

345.67

345.7

300

   68.90

+  8.20

____________

77

300

What property is this?

4 (9 + 2)

Distributive Property

300

Matt is competing in the long jump event. His first jump was 3.56 m. So far the longest jump in the event is 4.02 m. How much farther than his first jump must Matt jump to be in first place?

0.46 m

400

45 - 11.22 = ?

33.78

400

Round to the nearest hundredth. 

100.654

100.65 or 100.650

400

   48.56

-   5.26

____________

44

400

Solve.  

1.500 + 2.200 + 3.100 = ?

6.8

400

Sarita has some ribbon. After she used 23.8 cm of it, she had 50 cm left. How much ribbon did Sarita start with?

73.8 cm

500

12345 - 123.12 = ?

12,221.88

500

Round to the nearest thousandth. 


1.2458

1.246

500

   12345.67

+        8.91

____________

12,355

500

Solve. 

4 (6 + 8) = ?


56

500

Sofia wanted to go on a hike that was a total of 6.3 miles. She stopped at a sign that said “you reached 3.45 miles”. How many more miles does she have left of the hike?

2.85 miles