Adding fractions worksheets
Twelve like-denominator additions — add the tops, keep the bottom, write the answer as a fraction.
Best fit: 4th grade · 8 sheets, answer keys included · Free, no sign-up
The full set: 8 worksheets with answer keys
Eight sheets in the same layout with different problems: download them as one PDF or print one at a time.
Worksheets
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Sheet 1
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Sheet 2
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Sheet 3
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Sheet 4
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Sheet 5
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Sheet 6
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Sheet 7
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Sheet 8
Answer keys
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Sheet 1 answers
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Sheet 2 answers
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Sheet 3 answers
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Sheet 4 answers
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Sheet 5 answers
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Sheet 6 answers
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Sheet 7 answers
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Sheet 8 answers
About these worksheets
Adding fractions starts with like denominators, where the rule is easy to see: three eighths plus two eighths is five eighths — add the counts, the part size doesn’t change. Every sum in the set stays a proper fraction, keeping the focus on the principle. The critical error to catch early: adding the denominators too (3/8 + 2/8 is NOT 5/16). Unlike denominators come later and depend on the equivalent-fractions skill.
Grade level: these worksheets are part of our 5th grade math worksheets collection.
Frequently asked questions
Why don’t you add the denominators?
The denominator names the part size; the numerator counts parts. Adding 3 eighths and 2 eighths gives 5 eighths — the size of the parts never changed.
Do any answers go over one whole?
No — every sum here is a proper fraction, so attention stays on the add-the-numerators principle.
What comes after like denominators?
Unlike denominators, using equivalent fractions to make them match — practice that skill on the equivalent fractions worksheet first.