Answers
1–100
Chapter 16
Answers and Explanations
H
ere are the answer explanations for all 1,001 practice problems.
1.
5
12
Get a common denominator of 12 and then perform the arithmetic in the numerator:
1
2
3
4
5
6
1 6
2 6
3 3
4 3
5 2
6 2
6
12
9
12
10
12
6 9 10
12
+ −
=
+
−
=
+
−
= + −
=
( )
( )
( )
( )
( )
( )
5 5
12
2.
307
20
Get a common denominator of 60 and then perform the arithmetic in the numerator:
11
3
3
5
17
20
11 20
3 20
3 12
5 12
17 3
20 3
220
60
36
60
5
+ +
=
+
+
=
+
+
( )
( )
( )
( )
( )
( )
1 1
60
220 36 51
60
307
20
=
+ +
=