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NF.1 Adding Fractions with Unlike Denominators - Printable Math Worksheets 5th Grade - Wayground

NF.1 Adding Fractions with Unlike Denominators

Jamie Coyle

Created by Jamie Coyle

7 questions

5th Grade

Math

NF.1 Adding Fractions with Unlike Denominators is a Grade 5 mathematics worksheet that builds fluency with finding common denominators and adding fractions. Across seven multiple-choice questions, students identify possible and impossible common denominators, solve a real-world fraction addition problem, and add mixed numbers such as 2 5/10 + 1 1/2. The worksheet also includes an item involving fraction operations with like denominators, helping students connect denominator knowledge to accurate computation. This free printable worksheet is useful for guided practice, independent work, homework, or a quick check of Grade 5 fraction skills. Students must select answers rather than show every calculation, so teachers can use follow-up discussion to have them explain why a denominator works, how an equivalent fraction supports addition, and why an answer choice is reasonable. A complete answer key is included for efficient review and grading.

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NF.1 Adding Fractions with Unlike Denominators

Total questions: 7

Name
Class
Date
1.
What number could be a common denominator for these two fractions?
2/3   and   3/4
a)
3
b)
4
c)
7
d)
12
2.
Tim did 1/12 of a load of laundry on Sunday and 1/4 of a load of laundry on Saturday. What fraction of laundry did Tim do in total?
a)
2/16 loads done 
b)
1/3 loads done 
c)
2/3 loads done 
d)
2/12 loads done 
3.
2 5/10 +1 1/2
a)
4 1/10
b)
3 5/10
c)
5 6/10
d)
4
4.

​I can add and subtract fractions with like denominators.

38+18=\frac{3}{8}+\frac{1}{8}=  

a)

14\frac{1}{4}  

b)

12\frac{1}{2}  

c)

58\frac{5}{8}  

d)

416\frac{4}{16}  

5.

2910 +6 13=2\frac{9}{10}\ +6\ \frac{1}{3}=  

a)

9 7309\ \frac{7}{30}  

b)

8 10138\ \frac{10}{13}  

c)

9 17309\ \frac{17}{30}

d)

8 7308\ \frac{7}{30}  

6.

4 45 +3 254\ \frac{4}{5}\ +3\ \frac{2}{5}  

a)

7 157\ \frac{1}{5}  

b)

7 457\ \frac{4}{5}  

c)

8 158\ \frac{1}{5}  

d)

88  

7.
Which of these numbers could NOT be a common denominator for these two fractions?
2/4   and   3/8
a)
32
b)
12
c)
8
d)
24
WaygroundAnswer Key

NF.1 Adding Fractions with Unlike Denominators

Total questions: 7

1.
d) 12
2.
b) 1/3 loads done 
3.
d) 4
4.
b)

12\frac{1}{2}  

5.
a)

9 7309\ \frac{7}{30}  

6.
c)

8 158\ \frac{1}{5}  

7.
b) 12

FAQs

What does the NF.1 Adding Fractions with Unlike Denominators worksheet cover?

This Grade 5 worksheet uses seven multiple-choice questions to practice identifying common denominators and adding fractions with unlike denominators. Students apply the skill to a laundry word problem, add mixed numbers, and distinguish denominators that can or cannot serve as common denominators.

How can I use this worksheet to teach adding fractions with unlike denominators?

First model how to test whether a number is a common denominator, using the worksheet’s 2/3 and 3/4 example to connect common multiples with equivalent fractions. Then have students explain their reasoning for the laundry word problem and the mixed-number addition item, rather than choosing an answer without showing how the denominators were aligned.

What mistakes should I watch for when students complete this fraction worksheet?

Students may select one of the original denominators instead of a shared multiple, or choose a number that is not divisible by both denominators. In the 1/12 plus 1/4 word problem, watch for adding numerators and denominators directly; in the mixed-number item, check that students convert or otherwise align the fractional parts before combining them.

How do I assign and grade this worksheet?

Wayground provides this worksheet as a printable PDF and as a digital quiz, and it includes a complete answer key. You can review the seven multiple-choice responses directly in the digital version, or grade printable submissions by scanning student work with the Wayground for Teachers app.

How can I differentiate this worksheet for my students?

Use the worksheet’s Advanced Settings to increase font size or adjust font spacing so the fraction expressions and multiple-choice options are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language while students work through the common-denominator and fraction-addition items.

Where can I find more worksheets like this on Wayground?

Wayground offers a comprehensive collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.