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McGraw Hill Glencoe Algebra 1, 2012

MH

McGraw Hill Glencoe Algebra 1, 2012 View details

5. Multiplying and Dividing Rational Numbers

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Exercise 44 Page p19

Multiply the number of hours by the number of weeks.

$18$ h

We can find out how many hours Samantha practices in a month by multiplying the number of hours she practices in a week by the number of weeks in a month. Since there are approximately

4

weeks in a month, we can multiply

4 \frac{1}{2}

hours per week by

4

weeks.

4 \frac{1}{2} \cdot 4

$a \frac{b}{c} = \frac{a \cdot c + b}{c}$

\frac{4 \cdot 2 + 1}{2} \cdot 4

Multiply

\frac{8 + 1}{2} \cdot 4

Add terms

\frac{9}{2} \cdot 4

$a = \frac{a}{1}$

\frac{9}{2} \cdot \frac{4}{1}

Multiply

\frac{9 \cdot 4}{2 \cdot 1}

Multiply

\frac{3 6}{2}

Calculate quotient

18

Samantha practices the flute for

18

hours in one month.

Subchapter links

Exercises p.19-p19