Chapter R
PREALGEBRA REVIEW
Exercises
2. 8
77777777 7⋅⋅⋅⋅⋅⋅⋅⋅=
10.
() ()
()
712272 71225
765
730
37
+÷ −=+÷
=+
=+
=
20. 3
54 2333 23= ⋅⋅⋅= ⋅
22. 22
100 2 2 5 5 2 5=⋅⋅⋅= ⋅
24.
2
2
15 3 5
20 2 2 5 2 5
LCM 2 3 5 4 3 5 60
=⋅
=⋅⋅= ⋅
=⋅⋅=⋅⋅=
28.
()
10 7 3
3
710 10
70 3
10
73
×+
=
+
=
=
32. 30 235
45 335
23
⋅⋅
=
⋅⋅
⋅
=5⋅
33⋅5⋅
38. 52 52
33 3
3
3
1
−
−=
=
=
40. 8116 9
+= +
Chapter R Prealgebra Review
4
42. 31 12 5
54 2020
12 5
20
7
20
−= −
−
=
=
48. 5
29
4
29
1
9
−
52. 5
32
5
44
11
55
1
15
=
−=−
54. 113
554
12 12 12
166
44 4
21212
7
12
1==
−=− =−
5
=
16⋅3
215⋅1
3=
62. 1445
13534
4
÷=⋅
=
15
⋅
92
25
92
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=
1
215
94
, or 1
55
⋅
=
Section R Exercises
5
68. 211
82
523
⎛⎞
+÷ −
⎜⎟
70. 63
2.006 2 2
1000 500
==
72. 8024.5
Tenths
74. 0.05
Five hundredths
76. 12.235
Twelve and two hundred thirty-five
thousandths
84. 2.5
1.6
0.9
−
86. 6.24 0.6 3.744×=
88. 100 5.3 530×=
94. 2
8.6 0.6 8.6 0.36
8.96
+=+
=
102. 8% 0.08=
104. 180% 1.8=
106. 0.05 5%=
108. 0.0148 1.48%=
110.
0.375
383.000
824
60
56
=
30
28
20
20
0
71.75 175%
4==
Chapter R Prealgebra Review
6
118. 6.00 2.37 1.97 1.66−−=
1.66 m