Add and Subtract Unlike Fractions - 5th Grade Math
Card 1 of 20
Identify the common denominator used in $\frac{3}{4}+\frac{2}{3}=\frac{9}{12}+\frac{8}{12}$.
Identify the common denominator used in $\frac{3}{4}+\frac{2}{3}=\frac{9}{12}+\frac{8}{12}$.
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$12$. $12$ is the LCD of $4$ and $3$.
$12$. $12$ is the LCD of $4$ and $3$.
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What is $\frac{9}{10}-\frac{2}{15}$? Give the answer in simplest form.
What is $\frac{9}{10}-\frac{2}{15}$? Give the answer in simplest form.
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$\frac{23}{30}$. Convert to $\frac{27}{30}-\frac{4}{30}$ using LCD 30.
$\frac{23}{30}$. Convert to $\frac{27}{30}-\frac{4}{30}$ using LCD 30.
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What is $3\frac{1}{5}-\frac{3}{4}$? Give the answer as a mixed number in simplest form.
What is $3\frac{1}{5}-\frac{3}{4}$? Give the answer as a mixed number in simplest form.
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$2\frac{9}{20}$. Convert to $\frac{16}{5}-\frac{3}{4}$ using LCD 20.
$2\frac{9}{20}$. Convert to $\frac{16}{5}-\frac{3}{4}$ using LCD 20.
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What is $1\frac{1}{2}+\frac{2}{3}$? Give the answer as a mixed number in simplest form.
What is $1\frac{1}{2}+\frac{2}{3}$? Give the answer as a mixed number in simplest form.
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$2\frac{1}{6}$. Convert $1\frac{1}{2}$ to $\frac{3}{2}$, then add using LCD 6.
$2\frac{1}{6}$. Convert $1\frac{1}{2}$ to $\frac{3}{2}$, then add using LCD 6.
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What is $\frac{3}{10}+\frac{7}{15}$? Give the answer in simplest form.
What is $\frac{3}{10}+\frac{7}{15}$? Give the answer in simplest form.
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$\frac{23}{30}$. Convert to $\frac{9}{30}+\frac{14}{30}$ using LCD 30.
$\frac{23}{30}$. Convert to $\frac{9}{30}+\frac{14}{30}$ using LCD 30.
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What is $\frac{11}{12}-\frac{5}{8}$? Give the answer in simplest form.
What is $\frac{11}{12}-\frac{5}{8}$? Give the answer in simplest form.
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$\frac{7}{24}$. Convert to $\frac{22}{24}-\frac{15}{24}$ using LCD 24.
$\frac{7}{24}$. Convert to $\frac{22}{24}-\frac{15}{24}$ using LCD 24.
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Find and correct the error: $\frac{1}{2}+\frac{1}{3}=\frac{2}{5}$. What is the correct sum?
Find and correct the error: $\frac{1}{2}+\frac{1}{3}=\frac{2}{5}$. What is the correct sum?
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$\frac{5}{6}$. Error: added denominators; correct method uses LCD 6.
$\frac{5}{6}$. Error: added denominators; correct method uses LCD 6.
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What is $\frac{3}{5}+\frac{1}{2}$? Give the answer in simplest form.
What is $\frac{3}{5}+\frac{1}{2}$? Give the answer in simplest form.
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$\frac{11}{10}$. Convert to $\frac{6}{10}+\frac{5}{10}$ using LCD 10.
$\frac{11}{10}$. Convert to $\frac{6}{10}+\frac{5}{10}$ using LCD 10.
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What is $\frac{7}{8}-\frac{1}{3}$? Give the answer in simplest form.
What is $\frac{7}{8}-\frac{1}{3}$? Give the answer in simplest form.
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$\frac{13}{24}$. Convert to $\frac{21}{24}-\frac{8}{24}$ using LCD 24.
$\frac{13}{24}$. Convert to $\frac{21}{24}-\frac{8}{24}$ using LCD 24.
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What is $\frac{5}{6}-\frac{1}{4}$? Give the answer in simplest form.
What is $\frac{5}{6}-\frac{1}{4}$? Give the answer in simplest form.
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$\frac{7}{12}$. Convert to $\frac{10}{12}-\frac{3}{12}$ using LCD 12.
$\frac{7}{12}$. Convert to $\frac{10}{12}-\frac{3}{12}$ using LCD 12.
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What is $\frac{2}{9}+\frac{1}{6}$? Give the answer in simplest form.
What is $\frac{2}{9}+\frac{1}{6}$? Give the answer in simplest form.
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$\frac{7}{18}$. Convert to $\frac{4}{18}+\frac{3}{18}$ using LCD 18.
$\frac{7}{18}$. Convert to $\frac{4}{18}+\frac{3}{18}$ using LCD 18.
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State the general formula for $\frac{a}{b}+\frac{c}{d}$ using a common denominator.
State the general formula for $\frac{a}{b}+\frac{c}{d}$ using a common denominator.
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$\frac{a}{b}+\frac{c}{d}=\frac{ad+bc}{bd}$. Cross-multiply and add numerators over the product of denominators.
$\frac{a}{b}+\frac{c}{d}=\frac{ad+bc}{bd}$. Cross-multiply and add numerators over the product of denominators.
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State the general formula for $\frac{a}{b}-\frac{c}{d}$ using a common denominator.
State the general formula for $\frac{a}{b}-\frac{c}{d}$ using a common denominator.
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$\frac{a}{b}-\frac{c}{d}=\frac{ad-bc}{bd}$. Cross-multiply and subtract numerators over the product of denominators.
$\frac{a}{b}-\frac{c}{d}=\frac{ad-bc}{bd}$. Cross-multiply and subtract numerators over the product of denominators.
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What is the least common denominator (LCD) of $\frac{1}{6}$ and $\frac{1}{8}$?
What is the least common denominator (LCD) of $\frac{1}{6}$ and $\frac{1}{8}$?
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$24$. LCD is the smallest number divisible by both 6 and 8.
$24$. LCD is the smallest number divisible by both 6 and 8.
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What is $\frac{4}{7}+\frac{3}{14}$? Give the answer in simplest form.
What is $\frac{4}{7}+\frac{3}{14}$? Give the answer in simplest form.
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$\frac{11}{14}$. Convert to $\frac{8}{14}+\frac{3}{14}$ using LCD 14.
$\frac{11}{14}$. Convert to $\frac{8}{14}+\frac{3}{14}$ using LCD 14.
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What is $\frac{5}{12}+\frac{1}{8}$? Give the answer in simplest form.
What is $\frac{5}{12}+\frac{1}{8}$? Give the answer in simplest form.
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$\frac{13}{24}$. Convert to $\frac{10}{24}+\frac{3}{24}$ using LCD 24.
$\frac{13}{24}$. Convert to $\frac{10}{24}+\frac{3}{24}$ using LCD 24.
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What is the least common denominator (LCD) of $\frac{1}{9}$ and $\frac{1}{12}$?
What is the least common denominator (LCD) of $\frac{1}{9}$ and $\frac{1}{12}$?
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$36$. LCD is the smallest number divisible by both 9 and 12.
$36$. LCD is the smallest number divisible by both 9 and 12.
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What is $\frac{2}{3}+\frac{5}{4}$? Give the answer as an improper fraction in simplest form.
What is $\frac{2}{3}+\frac{5}{4}$? Give the answer as an improper fraction in simplest form.
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$\frac{23}{12}$. Convert to $\frac{8}{12}+\frac{15}{12}$ using LCD 12.
$\frac{23}{12}$. Convert to $\frac{8}{12}+\frac{15}{12}$ using LCD 12.
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What is $2\frac{3}{4}+1\frac{2}{3}$? Give the answer as a simplified mixed number.
What is $2\frac{3}{4}+1\frac{2}{3}$? Give the answer as a simplified mixed number.
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$4\frac{5}{12}$. Convert to improper fractions, add using LCD 12, then simplify.
$4\frac{5}{12}$. Convert to improper fractions, add using LCD 12, then simplify.
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What is the least common denominator (LCD) of $\frac{1}{4}$ and $\frac{1}{10}$?
What is the least common denominator (LCD) of $\frac{1}{4}$ and $\frac{1}{10}$?
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$20$. LCD is the smallest number divisible by both 4 and 10.
$20$. LCD is the smallest number divisible by both 4 and 10.
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