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Math Fundamentals
Fractions I: Multiplication and Division

1
The Meaning and Properties of Fractions

Problem  1
practice icon

Name the numerator and denominator for each.

  1. \(\displaystyle\frac{3}{4}\)

  2. \(\displaystyle\frac{a}{5}\)

  3. \(\displaystyle\frac{7}{1}\)

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Molly S. cc
Molly S.
Aaron cc
Aaron
Edwin cc espanol spanish
Edwin
Problem  2
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Write \(\displaystyle\frac{3}{4}\) as an equivalent fraction with denominator \(20\).

Choose instructor to watch:
Mr. McKeague cc
Mr. McKeague
Molly S. cc
Molly S.
Aaron cc
Aaron
Edwin cc espanol spanish
Edwin
Problem  3
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Write \(\displaystyle\frac{3}{4}\) as an equivalent fraction with denominator \(12x\).

Choose instructor to watch:
Molly M. cc
Molly M.
Molly S. cc
Molly S.
Matt cc
Matt
Edwin cc espanol spanish
Edwin
Problem  4
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Write \(\displaystyle\frac{10}{12}\) as an equivalent fraction with denominator \(6\).

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Matt cc
Matt
Edwin cc espanol spanish
Edwin
Problem  5
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Simplify each expression.

  1. \(\displaystyle\frac{24}{1}\)

  2. \(\displaystyle\frac{24}{24}\)

  3. \(\displaystyle\frac{48}{24}\)

  4. \(\displaystyle\frac{72}{24}\)

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Lauren cc
Lauren
Matt cc
Matt
Edwin cc espanol spanish
Edwin
Problem  6
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Write each fraction as an equivalent fraction with denominator \(24\). Then write them in order from smallest to largest. \(\qquad \displaystyle\frac{5}{8} \qquad \displaystyle\frac{5}{6} \qquad \displaystyle\frac{3}{4} \qquad \displaystyle\frac{2}{3}\)

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Matt cc
Matt
Edwin espanol spanish
Edwin

2
Mixed-Number Notation

Problem  1
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Change \(2\displaystyle\frac{3}{4}\) to an improper fraction.

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Mr. McKeague cc
Mr. McKeague
Molly S. cc
Molly S.
Aaron cc
Aaron
Edwin espanol spanish
Edwin
Problem  2
practice icon

Change \(5\dfrac{3}{4}\) to an improper fraction, use the shortcut.

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Lauren cc
Lauren
Aaron cc
Aaron
Edwin cc espanol spanish
Edwin
Problem  3

Change \(6\displaystyle\frac{5}{9}\) to an improper fraction.

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Molly S. cc
Molly S.
Molly M. cc
Molly M.
Matt cc
Matt
Edwin cc espanol spanish
Edwin
Problem  4
practice icon

Change \(\displaystyle\frac{11}{4}\) to a mixed number.

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Mr. McKeague cc
Mr. McKeague
Rachel cc
Rachel
Matt cc
Matt
Edwin espanol spanish
Edwin
Problem  5
practice icon

Write as a mixed number.

  1. \(\displaystyle\frac{10}{3}\)

  2. \(\displaystyle\frac{208}{24}\)

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Molly M. cc
Molly M.
Matt cc
Matt
Edwin espanol spanish
Edwin
Problem  6
Choose instructor to watch:
Katherine cc
Katherine
Logan cc
Logan
Octabio espanol spanish
Octabio

3
Prime Numbers, Factors, and Simplifying Fractions and Mixed Numbers

Problem  1
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Identify each as either a prime number or a composite number. For those that are composite, give two divisors other than itself or \(1\).

  1. \(43\)

  2. \(12\)

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Lauren cc
Lauren
Aaron cc
Aaron
Anthony cc espanol spanish
Anthony
Problem  2
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Factor \(60\) into a product of primes.

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Mr. McKeague cc
Mr. McKeague
Gordon cc
Gordon
Stephanie cc
Stephanie
Cynthia cc espanol spanish
Cynthia
Problem  3
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Reduce the fraction \(\displaystyle\frac{12}{15}\) to lowest terms.

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Matt cc
Matt
Anthony cc espanol spanish
Anthony
Problem  4
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Laura is having a party. She puts 4 six-packs of soda in a cooler. At the end of the party she finds that only \(4\) sodas have been consumed. What fraction of the sodas are left? Write your answer in lowest terms.

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Rachel cc
Rachel
Aaron cc
Aaron
Cynthia cc espanol spanish
Cynthia
Problem  5
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Reduce \(\displaystyle\frac{6}{42}\) to lowest terms.

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Matt cc
Matt
Anthony cc espanol spanish
Anthony
Problem  6
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Reduce \(\displaystyle\frac{4}{40}\) to lowest terms.

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Matt cc
Matt
Cynthia cc espanol spanish
Cynthia
Problem  7
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Reduce \(\displaystyle\frac{105}{30}\) to lowest terms.

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Matt cc
Matt
Anthony cc espanol spanish
Anthony

4
Multiplication with Fractions, Mixed Numbers, and Area of a Triangle

Problem  1
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Multiply: \(\displaystyle\frac{3}{5}\cdot \displaystyle\frac{2}{7}\)

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Aaron cc
Aaron
Anthony cc espanol spanish
Anthony
Problem  2
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Multiply: \(\displaystyle\frac{3}{8}\cdot 5\)

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Aaron cc
Aaron
Cynthia cc espanol spanish
Cynthia
Problem  3
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Multiply: \(\displaystyle\frac{1}{2}\left(\displaystyle\frac{3}{4}\cdot \displaystyle\frac{1}{5}\right)\)

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Lauren cc
Lauren
Matt cc
Matt
Anthony cc espanol spanish
Anthony
Problem  4
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Multiply: \(\displaystyle\frac{15}{8}\cdot \displaystyle\frac{4}{9}\)

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Matt cc
Matt
Cynthia cc espanol spanish
Cynthia
Problem  5
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Multiply: \(\displaystyle\frac{9}{2}\cdot \displaystyle\frac{8}{18}\)

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Mr. McKeague cc
Mr. McKeague
Molly M. cc
Molly M.
Aaron cc
Aaron
Anthony espanol spanish
Anthony
Problem  6
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Multiply: \(\displaystyle\frac{2}{3}\cdot \displaystyle\frac{6}{5}\cdot \displaystyle\frac{5}{8}\)

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Lauren cc
Lauren
Matt cc
Matt
Cynthia cc espanol spanish
Cynthia
Problem  7
Choose instructor to watch:
Lauren D.
Lauren D.
Ryan
Ryan
Problem  8
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Find \(\displaystyle\frac{1}{2}\) of \(\displaystyle\frac{2}{3}\)

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Lauren cc
Lauren
Matt cc
Matt
Anthony cc espanol spanish
Anthony
Problem  9
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What is \(\displaystyle\frac{3}{4}\) of \(12\)?

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Lauren cc
Lauren
Matt cc
Matt
Cynthia cc espanol spanish
Cynthia
Problem  10
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Multiply: \(2\displaystyle\frac{3}{4}\cdot 3\displaystyle\frac{1}{5}\)

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Arielle cc
Arielle
Stephanie cc
Stephanie
Matt cc
Matt
Edwin espanol spanish
Edwin
Problem  11
Choose instructor to watch:
Stephanie
Stephanie
Ryan
Ryan

5
Division with Fractions and Mixed Numbers

Problem  1
practice icon

Divide \(\displaystyle\frac{1}{2}\div \displaystyle\frac{1}{4}\)

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Mr. McKeague cc
Mr. McKeague
Lauren cc
Lauren
Preston cc
Preston
Anthony cc espanol spanish
Anthony
Problem  2
practice icon

Divide \(\displaystyle\frac{3}{8}\div \displaystyle\frac{9}{4}\)

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Lauren cc
Lauren
Preston cc
Preston
Cynthia cc espanol spanish
Cynthia
Problem  3
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Divide \(\displaystyle\frac{2}{3}\div 2\)

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Mr. McKeague cc
Mr. McKeague
Stephanie cc
Stephanie
Preston cc
Preston
Anthony cc espanol spanish
Anthony
Problem  4
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Divide \(2\div \displaystyle\frac{1}{3}\)

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Mr. McKeague cc
Mr. McKeague
Julieta cc
Julieta
Preston cc
Preston
Cynthia cc espanol spanish
Cynthia
Problem  5
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Divide \(\displaystyle\frac{4}{27}\div \displaystyle\frac{16}{9}\)

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Lauren cc
Lauren
Preston cc
Preston
Anthony espanol spanish
Anthony
Problem  6
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Divide

  1. \(\displaystyle\frac{16}{35}\div 8\)

  2. \(27\div\displaystyle\frac{3}{2}\)

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Lauren cc
Lauren
Preston cc
Preston
Cynthia cc espanol spanish
Cynthia
Problem  7
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Divide: \(1\displaystyle\frac{3}{5}\div 2\displaystyle\frac{4}{5}\)

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Molly S. cc
Molly S.
Stephanie cc
Stephanie
Matt cc
Matt
Edwin cc espanol spanish
Edwin
Problem  8
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Divide: \(5\displaystyle\frac{9}{10}\div 2\)

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Molly S. cc
Molly S.
Molly M. cc
Molly M.
Matt cc
Matt
Edwin cc espanol spanish
Edwin
Problem  9
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A \(4\)-H Club is making blankets to keep their lambs clean at the county fair. If each blanket requires \(\dfrac{3}{4}\) yard of material, how many blankets can they make from \(9\) yards of material?

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Lauren cc
Lauren
Preston cc
Preston
Anthony cc espanol spanish
Anthony