Math Drills
Adding Fractions (Unlike Denominators) Review
A-2Calculation
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What this worksheet covers
The procedure of finding a common denominator and then adding the numerators is built up through proper fractions, improper fractions and mixed numbers. Mixed numbers that carry, Fill in the Blank and sums of three fractions are covered, and the word problems include denominators in a multiple relationship and sums that come out as mixed numbers.
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Adding the denominators as they stand, so that 1/2 + 1/3 becomes 2/5, is the most frequent error. With mixed numbers, children add only the whole-number parts and leave the fractions alone, or fail to carry when the fraction part of the sum turns improper. Answers left unsimplified stand out as well.
Properties of Fractions supplies the common denominator this unit puts to use, adding fractions whose denominators do not match. Matching denominators first and adding the numerators afterward is the same procedure the next unit, Fraction Subtraction and Mixed Operations, uses again.
- Adding Proper Fractions (Unlike Denominators) · Calculation2 questions
- Adding Improper Fractions · Calculation2 questions
- Adding Mixed Numbers (Unlike Denominators) · No Carrying1 question
- Adding Mixed Numbers (Unlike Denominators) · With Carrying1 question
- Adding 3 Fractions · 3 Terms (Expressions)2 questions
Questions & answers
Problems and answers on this worksheet
These are the problems in “Adding Fractions (Unlike Denominators)”, shown with their answers.
(1)1/4+11/15 □
Answer: 59/60
(2)1/15+13/20 □
Answer: 43/60
(3)20/9+29/10 □
Answer: 5 11/90
(4)9/8+26/9 □
Answer: 4 1/72
(5)4 4/9+3 2/5 □
Answer: 7 38/45
(6)2 1/4+5 11/12 □
Answer: 8 1/6
(7)1/5+1/2+1/3 □
Answer: 1 1/30
(8)3/5+1/8+7/8 □
Answer: 1 3/5
What to do next
More worksheets in this unit
Adding Proper Fractions (Unlike Denominators)Adding Proper Fractions (Unlike Denominators) Fill in the Blank
Adding Proper Fractions (Unlike Denominators)Adding Proper Fractions (Unlike Denominators) Word Problems
Adding Improper FractionsAdding Improper Fractions Calculation
Adding Improper FractionsAdding Improper Fractions Fill in the Blank
Adding Mixed Numbers (Unlike Denominators)Adding Mixed Numbers (Unlike Denominators) Calculation
Adding Mixed Numbers (Unlike Denominators)Adding Mixed Numbers (Unlike Denominators) Fill in the Blank
Adding Fractions (Word Problems and Applications)Adding Fractions (Word Problems and Applications) Word Problems (Multiples, Working Backward)
Adding Fractions (Word Problems and Applications)Adding Fractions (Word Problems and Applications) Word Problems (2-Step, Mixed Numbers)
Adding 3 FractionsAdding 3 Fractions Calculation
Adding 3 FractionsAdding 3 Fractions Fill in the Blank
Adding 3 FractionsAdding 3 Fractions Word Problems
Adding Fractions (Unlike Denominators) ReviewAdding Fractions (Unlike Denominators) Review Word Problems
