Subtracting Fractions with Unlike Denominators
Practice subtracting fractions with different denominators by finding common denominators and simplifying results.
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Subtracting Fractions with Unlike Denominators
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Read each question carefully and subtract the fractions. Remember to find a common denominator before subtracting and simplify your answer to its lowest terms.
1. To subtract fractions with unlike denominators, you must first find a .
2. After finding a common denominator, you only subtract the .
3. The last step in subtracting fractions is to the answer.
1. Subtract: 3/4 - 1/2
2. Subtract: 5/6 - 1/3
3. Subtract: 7/8 - 1/4
Use the fraction bars to help you subtract. Shade the first fraction, then cross out the portion representing the second fraction.
1. 1/2 - 1/4 =
2. 2/3 - 1/6 =
1. What is the difference between 4/5 and 3/10?
1/5
1/10
5/10
1/2
2. Which of the following is equivalent to 1 - 1/3?
1/2
2/3
3/3
1/3
1. You can subtract fractions with unlike denominators directly without finding a common denominator.
True
False
2. The least common multiple (LCM) of the denominators is usually the best common denominator to use.
True
False
1. Sarah had 7/10 of a pizza. She ate 1/5 of the whole pizza. How much pizza is left?
2. A recipe calls for 3/4 cup of flour. If you only have 1/8 cup, how much more flour do you need?
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