Divide Unit Fractions by Whole Numbers - 5th Grade Math
Card 1 of 20
What is $\frac{1}{7} \div 7$?
What is $\frac{1}{7} \div 7$?
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$\frac{1}{49}$. Multiply the denominator: $7 \times 7 = 49$.
$\frac{1}{49}$. Multiply the denominator: $7 \times 7 = 49$.
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What is $\frac{1}{11} \div 2$?
What is $\frac{1}{11} \div 2$?
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$\frac{1}{22}$. Multiply the denominator: $11 \times 2 = 22$.
$\frac{1}{22}$. Multiply the denominator: $11 \times 2 = 22$.
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What is $\frac{1}{15} \div 3$?
What is $\frac{1}{15} \div 3$?
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$\frac{1}{45}$. Multiply the denominator: $15 \times 3 = 45$.
$\frac{1}{45}$. Multiply the denominator: $15 \times 3 = 45$.
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What is $\frac{1}{16} \div 8$?
What is $\frac{1}{16} \div 8$?
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$\frac{1}{128}$. Multiply the denominator: $16 \times 8 = 128$.
$\frac{1}{128}$. Multiply the denominator: $16 \times 8 = 128$.
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What is $\frac{1}{9} \div 3$?
What is $\frac{1}{9} \div 3$?
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$\frac{1}{27}$. Multiply the denominator: $9 \times 3 = 27$.
$\frac{1}{27}$. Multiply the denominator: $9 \times 3 = 27$.
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What is $\frac{1}{25} \div 5$?
What is $\frac{1}{25} \div 5$?
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$\frac{1}{125}$. Multiply the denominator: $25 \times 5 = 125$.
$\frac{1}{125}$. Multiply the denominator: $25 \times 5 = 125$.
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Identify the missing number: $\frac{1}{9} \div 4 = \frac{1}{\square}$.
Identify the missing number: $\frac{1}{9} \div 4 = \frac{1}{\square}$.
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$36$. Multiply the denominator: $9 \times 4 = 36$.
$36$. Multiply the denominator: $9 \times 4 = 36$.
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Find and correct the error: $\frac{1}{6} \div 3 = \frac{1}{2}$.
Find and correct the error: $\frac{1}{6} \div 3 = \frac{1}{2}$.
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Correct: $\frac{1}{6} \div 3 = \frac{1}{18}$. The error was dividing instead of multiplying the denominator.
Correct: $\frac{1}{6} \div 3 = \frac{1}{18}$. The error was dividing instead of multiplying the denominator.
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What is $\frac{1}{20} \div 4$?
What is $\frac{1}{20} \div 4$?
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$\frac{1}{80}$. Multiply the denominator: $20 \times 4 = 80$.
$\frac{1}{80}$. Multiply the denominator: $20 \times 4 = 80$.
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What is $\frac{1}{10} \div 5$?
What is $\frac{1}{10} \div 5$?
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$\frac{1}{50}$. Multiply the denominator: $10 \times 5 = 50$.
$\frac{1}{50}$. Multiply the denominator: $10 \times 5 = 50$.
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What is $\frac{1}{12} \div 6$?
What is $\frac{1}{12} \div 6$?
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$\frac{1}{72}$. Multiply the denominator: $12 \times 6 = 72$.
$\frac{1}{72}$. Multiply the denominator: $12 \times 6 = 72$.
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What is $\frac{1}{4} \div 2$?
What is $\frac{1}{4} \div 2$?
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$\frac{1}{8}$. Multiply the denominator: $4 \times 2 = 8$.
$\frac{1}{8}$. Multiply the denominator: $4 \times 2 = 8$.
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What is $\frac{1}{3} \div 7$?
What is $\frac{1}{3} \div 7$?
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$\frac{1}{21}$. Multiply the denominator: $3 \times 7 = 21$.
$\frac{1}{21}$. Multiply the denominator: $3 \times 7 = 21$.
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What is $\frac{1}{2} \div 9$?
What is $\frac{1}{2} \div 9$?
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$\frac{1}{18}$. Multiply the denominator: $2 \times 9 = 18$.
$\frac{1}{18}$. Multiply the denominator: $2 \times 9 = 18$.
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What is the rule for dividing a unit fraction by a whole number $n$?
What is the rule for dividing a unit fraction by a whole number $n$?
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$\frac{1}{a} \div n = \frac{1}{a \times n}$. Multiply the denominator by the whole number.
$\frac{1}{a} \div n = \frac{1}{a \times n}$. Multiply the denominator by the whole number.
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What is $\frac{1}{6} \div 2$?
What is $\frac{1}{6} \div 2$?
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$\frac{1}{12}$. Multiply the denominator: $6 \times 2 = 12$.
$\frac{1}{12}$. Multiply the denominator: $6 \times 2 = 12$.
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What is $\frac{1}{5} \div 3$?
What is $\frac{1}{5} \div 3$?
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$\frac{1}{15}$. Multiply the denominator: $5 \times 3 = 15$.
$\frac{1}{15}$. Multiply the denominator: $5 \times 3 = 15$.
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What is $\frac{1}{8} \div 4$?
What is $\frac{1}{8} \div 4$?
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$\frac{1}{32}$. Multiply the denominator: $8 \times 4 = 32$.
$\frac{1}{32}$. Multiply the denominator: $8 \times 4 = 32$.
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What is the missing number $n$ in $\frac{1}{6}\div 2=\frac{1}{n}$?
What is the missing number $n$ in $\frac{1}{6}\div 2=\frac{1}{n}$?
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$n=12$. Since $\frac{1}{6}\div 2=\frac{1}{12}$, $n=12$.
$n=12$. Since $\frac{1}{6}\div 2=\frac{1}{12}$, $n=12$.
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Which expression is equivalent to $\frac{1}{b} \div a$: $\frac{1}{b} \times a$ or $\frac{1}{b} \times \frac{1}{a}$?
Which expression is equivalent to $\frac{1}{b} \div a$: $\frac{1}{b} \times a$ or $\frac{1}{b} \times \frac{1}{a}$?
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$\frac{1}{b} \times \frac{1}{a}$. Dividing by $a$ equals multiplying by $\frac{1}{a}$
$\frac{1}{b} \times \frac{1}{a}$. Dividing by $a$ equals multiplying by $\frac{1}{a}$
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