Missing Fraction Part Word Problems With Unlike Denominators
Use equivalent fractions to find a missing part with unlike denominators.
Teaching notes for parents and teachers
How to teach it
Partition matching wholes into equal-sized pieces. Subtract the known part and check by recombining the parts.
Example to work through together
Use the model below as you explain the example. Have your student point to the quantities as you discuss them.
Count the cells. The first twelve make one unit whole; three more extend the total to 15/12. Seven cells represent the known part, and eight represent the missing part.
5/4 − 7/12 = 15/12 − 7/12 = 8/12 = 2/3
Ask your student
How can we rename both fractions using the same-sized pieces?
If your student needs help
If only one number in a fraction changes, compare the renamed amount with the original strip.
Choosing and using the worksheet
Each set has four short missing-part number word problems. The total is between 1 and 3 inclusive, and the known part is positive and no greater than the total. Every pair of given amounts has different displayed fraction denominators. Answers are nonnegative, with at most one zero in a set.
Make a practice set
Select the worksheet, answer key, or both. When both are selected, the answer key prints after the questions. Keep it separate if you want your student to work independently.
After your student finishes
Ask the child why the renamed fraction is equal to the original. Add the known and missing parts to check the stated total.
Word problemsAdding and Subtracting Fractions Word Problems With Like Denominators
Combine or remove fractional cable lengths measured using the same one-foot whole.
4 problems · Answer key included
Word problemsAdding and Subtracting Fractions Word Problems With Unlike Denominators
Use equivalent fractions to combine or remove cable lengths measured against the same one-foot whole.
4 problems · Answer key included
Word problemsMissing Fraction Part Word Problems
Find a missing fraction amount, including mixed numbers, and check by adding the parts.
4 problems · Answer key included
More about fractions · Grade 5 worksheets
Grade 5 selected skill connection: 5.NF.A.1–2 (selected unlike-denominator part-whole relationships; total from 1 to 3; common denominator at most 24). See the Common Core standards for this grade. This worksheet does not cover every requirement in the standard.