Round Decimals
Estimate Sums and Differences
Add Decimals
Subtract Decimals
Word Problems
100

Round 5.476 to the nearest hundredths

5.48

100

Round to the nearest ones place. Then add or subtract.  10.08 + 5.6

16

100
9.14 + 2.05

11.19

100

42.28 - 1.52 

40.76

100

Mrs. Trainer needs to purchase a classroom response clicker and a new calculator. A clicker costs $31.99 and a calculator costs $11.75. About how much money will it cost to buy both? 

(Round to the nearest ones place) 

$44

200

Round 4.35 to the nearest tenths place.

4.4

200

Round to the nearest ones place. Then add or subtract.  10.4 + 32.8

43

200

19.21 + 11.03

30.24

200

9.67 - 2.35

7.32

200

You decide to buy a hat for $10.95 and a t-shirt for $14.20. How much change will you receive if you pay with a $50 bill?

$24.85

300

Round 1.8 to the nearest ones place. 

2

300

Round to the nearest ones place. Then add or subtract. 42.01 - 5.92

36

300

25 + 8.46

33.46

300

97 - 16.98

80.02

300

Terrance is bicycling on a trail. He bicycles for 12.6 miles and takes a break. Then, he bicycles for 10.7 miles. How many miles has Terrance bicycled in all?

23.3 miles

400

Round 67.142 to the nearest ones place.

67

400

Round to the nearest ones place. Then add or subtract.  1.509 + 3.106

5

400

14.8 + 10.26

25.06

400

8 - 5.78

2.22

400

Ellen wanted to buy the following items:

1. A DVD player for $49.95

2.  A DVD holder for $19.95

3. Personal stereo for $21.95

How much does all of these items cost?

Does Ellen have enough money to buy all three items if she has $90?

$91.85 ; no

500

Round 110.079 to the nearest hundredths place.

110.08

500

Round to the nearest tens place. Then add or subtract. 25.21 - 12.47. 

20

500

8.9 + 0.15

9.05

500

30 - 21.48

8.52

500

David took a walk around a park twice. He took 12.4 minutes to walk the first round. In the second round, he took 3.2 fewer minutes than he did the first round. How long did David take to complete his walk altogether?

21.6 minutes