SET
EXERCISE
ForExtraHelp
Round to the nearestten.
EI
l. 48 50
2,532 530
3.467 470
4.8945 8950
5. 731 730
6. 17 20
7. 895 900
8. 798 800
10.874 900
11. 957 1000
12. 650 700
t4.4645 4600
15. 32,850 :12,900
1 6 . 1 9 8 , 4 0 21 9 8 , 4 0 0
17.5876 6000
r8. 4500 s000
19. 7500 8000
20.2001 2000
21. 45,340 4s,000
22.735,562 736,000
23. 373,405 373,0(x)
2 4 . 6 , 7 1 3 , 8 5 5r i , 7 l 4 , ( x x ,
Round to the nearesthundred.
9. 146 t00
13. 9079 9100
Round to the nearestthousand.
H
25.
Estimatethe sum or differenceby first rounding to the nearestten. Showyour work.
78
26.
62
97
+97
4f)
lB0
+BB
27.
8074
-2347
5720
67 3
2B
28.
(i40
:J00
Estimatethe sum by first rounding to the nearestten. Do any of the given sums seemto be incorrect when comparedto the
estimate?\{hich ones?
32. 836
31. 622
30. 4r
29. 45
Jta
7B
2I
77
1o
4
B
I
55
25
+938
+111
+60
+56
rB0
220;incorrcct
3947
932
t77
343
2940;incorrecl
890;incorrect
Estimatethe sum or differenceby first rounding to the nearesthundred. Showyour work.
33.
7348
+9247
16,s00
34.
568
47 2
938
+ 402
35.
6852
- r7 4B
15200
36.
9438
- 27 B7
q
6600
N
@
2400
U
CHAPTER
l: WholeNumbers
Planning a Kitchen. PerfectKitchensoffers custom kitchen packageswith three choicesfor each of four items: cabinets,
countertops,appliances,and flooring. The chart belowlists the price for each choice.
Perfect Kitchens lets you customize your kitchen with
one choice from each of the following four features:
37. Estimatethe cost of remodelinga kitchen with choices
(a), (d), (g),and (j) by rounding to the nearesthundred
dollars.
38. Estimatethe cost of a kitchen with choices(c), (f), (i),
and (l) by rounding to the nearesthundred dollars.
$20.500
$11.200
39. Saraand Ben are planning to remodel their kitchen and
have a budget of $17,700.Estimateby rounding to the
nearesthundred dollars the cost oftheir kitchen
remodelingproject if they chooseoptions (b), (e), (i),
and (k). Can they afford their choices?
n :o
$18,900
40. The Davidsonsmust make a final decision on the
kitchen choicesfor their new home. The allotted
kitchen budget is $16,000.Estimateby rounding to the
nearesthundred dollars the kitchen cost ifthey choose
options (a), (f), (h), and (l). Does their budget allotment
coverthe cost?
$ 1 5 , 8 0 y0 e; s
41. Supposeyou are planning a new kitchen and must stay
within a budget of $14,500.Decide on the options you
would like and estimatethe cost by rounding to the
nearesthundred dollars.Does your budget support
your choices?
42. Supposeyou are planning a new kitchen and must stay
within a budget of $18,500.Decide on the options you
would like and estimatethe cost by rounding to the
nearesthundred dollars.Does your budget support
your choices?
Answerswill varydependingon the optionschosen.
Answers
will varydependingon the optionschosen.
3l
'].4
Exercise
Set
Estimate the sum by first rounding to the nearest hundred. Do any of the given sums seem to be incorrect when compared to
the estimate?\A/hich ones?
43.
2t6
B4
745
+595
44.
1640
4BI
702
623
+1043
45.
1849
1600
750
428
63
+205
46.
326
275
758
+943
t446
2800;incorrect
2302
1500
2300
Estimate the sum or difference by first rounding to the nearest thousand. Show your work.
47.
9643
4821
8943
+7004
7648
9348
7842
+2222
49.
92,1 49
- 2 2,5 5 5
69,000
50.
84,890
- r I,l I 0
74,000
27,000
31,000
H
48.
use
Use < or > for l_l to write a true sentence.Draw a number line if necessary.
5r.0 E 17
52.32 4 O >
ffi.34 J
55.1000E roor
5 6 . 7 7[
5 7 . 1 3 3f ] r S Z
58. e99 E ggZ
5 9 . 4 6 0I
6 0 . 3 4 5I
6 r . 3 7t r l 1
62. 12 z 32
17
rrZ
+SO
12
5 4 . 2 8E t 8
Daily Newspapers. The top three daily newspapers in the United Statesare USA Today,the WaIl StreetJournal, and the New
York Times.The daily circulation of each as of September 30, 2005, is listed in the table below. Use this table when answering
Exercises63 and 64.
USAToday
Wall StreetJournal
NewYorkTimes
2,296,335
2,083,660
1,126,190
5ource:
AuditBureau
of Circulations
63. Use an inequality to compare the daily circulation of the
WaIl StreetJournal and USA Today.
.- 2,296,335,
2,083,660
> 2,083,660
or 2,296,335
64. Use an inequality to compare the daily circulation of
USA Todayand the New York Times.
2 , 2 9 6 , 3 3>5 1 , 1 2 6 , 1 9o0r,1 , 1 2 6 , i 9<0 2 , 2 9 6 , 3 3 5
o
(,o
32
CHAPTER
l: WholeNumbers