Math Drills

Adding Fractions (Unlike Denominators) Review

B-2

Word Problems

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What this worksheet covers

Grade: Grade 5 (Elementary School)
Topic: Adding Fractions (Unlike Denominators)

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.

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 Fractions (Word Problems and Applications) · Unlike Denominators1 question
Adding Fractions (Word Problems and Applications) · Unlike Denominators (Multiple Relationship)1 question
Adding Fractions (Word Problems and Applications) · Unlike Denominators, Multiple Relationship (Sum Is a Mixed Number)1 question
Adding Fractions (Word Problems and Applications) · Unlike Denominators (Working Backwards)1 question
Adding 3 Fractions · 3 Terms (Word Problems)1 question

Questions & answers

Problems and answers on this worksheet

These are the problems in “Adding Fractions (Unlike Denominators)”, shown with their answers.

(1)There is 1/4kg of flour. You received 1/5kg more. How many kg of flour are there altogether? Answer □
Answer: 9/20kg
(2)There are 1/3L and 5/9L of juice. How many L are there in total? Answer □
Answer: 8/9L
(3)There is 1/2m of ribbon. You joined on 7/12m more. How many m is the ribbon altogether? Answer □
Answer: 1 1/12m
(4)You used 2/5L of paint, and 5/11L was left. How many L of paint were there at first? Answer □
Answer: 47/55L
(5)You drank 1/3L of juice in the morning, 3/8L at noon, and 7/8L at night. How many L did you drink in total? Answer □
Answer: 1 7/12L