Chapter 3 Operations With Decimals Worksheet Page 12
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13Round each decimal to the indicated place-value position.
HOMEWORK
7.445; tenths
7.999; tenths
9.
10.
For
See
Exercises
Examples
5.68; ones
10.49; ones
11.
12.
9–16
1, 2
2.499; hundredths
40.458; hundredths
13.
14.
17–20
3
5.4572; thousandths
45.0189; thousandths
15.
16.
RACING
The winner of the 2007 Indianapolis 500, Dario Franchitti, had
17.
an average speed of 151.774 miles per hour. Round 151.774 miles per
hour to the nearest ten miles per hour.
CELL PHONES
In the U.S., there are 48.81 cell phones for every
18.
100 people. Round 48.81 to the nearest whole number.
MONEY MATTERS
The price of a 12-pack of soda is $4.39. How much is
19.
this to the nearest dollar?
CURRENCY
Fifty Japanese yen are equal to $0.475441 U.S. dollars. Round
20.
this amount of U.S. dollars to the nearest cent.
CALCULATOR
A calculator will often show the results of a calculation with
a very long decimal. Round each of the numbers on the calculator
displays to the nearest thousandth.
. 2491666667
1054.677828
21.25103904
21.
22.
23.
Round each decimal to the indicated place-value position.
9.56303; hundredths
988.08055; thousandths
24.
25.
87.09; tens
1,567.893; ten-thousandths
26.
27.
CYCLING
The table shows
28.
Tour de France Average Winning Speeds
the average winning speeds
Winner
Year
Average Speed
in the Tour de France from
(km/h)
2000–2005. Will it help to
Lance Armstrong
2005
41.654
round these average speeds
Lance Armstrong
2004
40.553
before listing them in order
Lance Armstrong
2003
40.94
NYSCC • NYSMT
from least to greatest?
Lance Armstrong
2002
39.93
Extra Practice, pp. 678, 708
Explain.
Lance Armstrong
2001
40.02
Lance Armstrong
2000
38.57
Source: ESPN
H.O.T.
Problems
OPEN ENDED
Give an example of a decimal that when rounded
29.
to the nearest tenth is 15.0 and to the nearest hundredth is 15.00.
Which One Doesn’t Belong?
Identify the decimal that does not belong with
30.
the other three. Explain your reasoning.
11.23
11.26
11.19
11.24
148
Chapter 3 Operations with Decimals
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