THREADED SOLUTIONS WEEK
#1
Question 1  7 are in the text
1)
Problem 217, page 53
6 3/8 + 9 1/24 = 6
9/24
+ 9 1/24 = 15 10/24 =
15 5/12
2)
Problem 221, page 54
12 1/9 – 4 2/3 = 109/9 – 14/3 = 109 – 42
= 67
=
7 4/9
9
9
Summary Practice Test
3)
Problems #4 page 60
Convert to a mixed fraction
163
=
18 1/9
9
4)
Problem #5 page 60
Convert to an Improper Fraction
8 1/8 = 8 * 8 = 64 + 1 = 65, placed over 8 =
65/8
5)
Problems #10, page 60
1
1
1
3
x
2
x
6
=
3
x
2
x
6
=
1
4
4
9
4
4
9
4
1
1
6)
Problems #11, page 60
2
7 1/9 x 6/7 = 64
x 6
=
128
or 6 2/21
9
7
21
3
7)
Problems #12, page 60
1
3
÷ 6 = 3
x
1
=
1
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7
7
6
14
2
Drill Problems
Problems 6 1, 6  3 & 6  5, page 157
Convert decimals to percents
8)
Problem 61
.74 =
74%
9)
Problem 63
.9 =
90%
10)
Problem 65
3.561 =
356.1%
11)
Solution for Problem #10
When going from a percent,
2.0035%
, to a decimal the decimal point is moved
two places to the left, thus the decimal equivalent to
2.0035%
is
.020035
. Now let's
count the decimal places to the right of the decimal, we have 10th's, hundredth's,
thousandth's, ten thousandth's, one hundred thousandth's and millions.
The million position is the "5" in our decimal and becomes our denominator
20,035
1,000,000
This number must be reduced to lowest terms. both the numerator, 20,035 and the
denominator of 1,000,000 can be divided by 5, thus your final answer, the correct
answer, is
4,007
200,000
Please let me know if you need further explanation:
12)
Solution for Problem #12
The initial problem is 2x
+ 4x
= 15
3
8
The common denominator is 24. You should set up the problem as follows:
2x + 4x = 15
16x + 12x = 360
3
8
1
24
24
24
This is what I did. From the original equation up and to the left, I divided the
denominator of the first fraction (3) into the new common denominator of 24. My
answer of 8 was then multiplied by the numerator of the first fraction (2x) and I got
16x.
The same procedure is repeated for the next fraction and the number on the
right side of the equal sign. The following is where we are at this point.
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 Spring '10
 
 Fractions, Elementary arithmetic, equal sign

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