Adding Fractions
Grade 4•45 minutes•CCSS.Math.Content.5.NF.A.1
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)
Learning Objective
I can add fractions with different denominators.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Explain why it is necessary to find a common denominator before adding fractions with different denominators.
2. What is the common denominator for ½ and ⅓? Show the steps to rewrite each fraction using this common denominator.
3. Add the following fractions: ¼ + ⅜. Show your work, including finding the common denominator and simplifying the answer if possible.
...and 4 more questions
Educational Video
Adding Fractions with Different Denominators
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