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Multiplying Decimals
Multiplying by 10's, 100's, and 1,000's
Dividing Decimals
Estimating Decimals
Word Problems
100
3.4 x 7
23.8
100
1.2 x 10
12
100
0.26/2
0.13
100
Estimate the sum to the nearest whole number.

13.543 + 11.382

25

(13.543 rounds to 14 and 11.382 rounds to 11)

100
Margo bought 5 DVDs for 5.24 each.  How much did she pay for all 5 DVDs?
$26.20
200
15.45 x 3
46.35
200
58.3 x 100
5,830
200
0.9/2
0.45
200
Estimate the difference by round to the nearest tenth.

10.46 - 3.52

7

(10.46 rounds to 10.5 and 3.52 rounds to 3.5)

200
Mr. Bloemer is planning a trip that is 342.45 miles away.  If he travels 124.9 miles and stops for a drink, how many more miles does he have left to travel?
217.55 miles
300
26.45 x 4
105.8 or 105.80
300
5.6 x 300
1,680
300
49.7/700
0.071
300
Estimate the quotient by rounding to the nearest tenth that can be equally divided into the divisor.

5.28/6

0.9

(5.2 falls between 4.8 and 5.4 and is closer to 5.4, so 5.28/6 is about 0.9)

300
Terry threw the shotput 23.42 feet and Ben threw the shotput 19.43 feet.  Rounded to the nearest tenth, how many more inches did Terry throw the shotput?
48 inches

(23.42 rounds to 23.4 and 19.43 rounds to 19.4)

23.4 - 19.4 = 4 feet

4 feet = 48 inches

400
58.37 x 8
466.96
400
34.7 x 600
20,820
400
2,164/4,000
0.541
400
Estimate the product by rounding to the nearest tenth

13.73 x 7

95.9

(13.73 rounds to 13.7 to the nearest tenth. 13.7 x 7 = 95.9

400
Gunner bought 4 pounds of grapes at $1.34 per pound and 5 muffins for $0.75 per muffin.  How much money did he spend for the grapes and muffins?
$9.11
500
163.78 x 6
982.68
500
78.35 x 4,000
313,400
500
164/2,000
0.082
500
Estimate the sum to the nearest hundredth

245.3728 + 34.56327

279.93

( 245.3728 rounds to 245.37 and 34.56327 rounds to 34.56)

500
A box of crackers cost $1.87 each.  How many boxes of crackers can you buy with a $20 bill?
10 boxes