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Addition of Unlike Fractions - Printable Mathematics Worksheets - Wayground

Addition of Unlike Fractions

20 questions

5th - 7th Grade

Mathematics

This free printable worksheet helps Grade 5–7 students add and subtract unlike fractions by identifying a common denominator, rewriting equivalent fractions, and completing the calculation. It includes 20 multiple-choice questions, with practice items such as 1/2 + 1/4, 8/9 − 5/6, and 7/8 − 1/6, as well as questions that ask students to select an appropriate common denominator. The worksheet is useful for guided practice, independent review, or a quick formative assessment in a mathematics classroom. Its multiple-choice format lets teachers check whether students understand the denominator-selection and equivalent-fraction steps, not just the final answer. A complete answer key is included, making this free printable worksheet easy to review, assign, and grade.

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Addition of Unlike Fractions

Total questions: 20

Name
Class
Date
1.
1/2 + 1/4 = 
a)
3/4
b)
2/4
c)
3/6
2.
19/20 - 3/10 = 
a)
15/20
b)
22/20
c)
13/20
3.
8/15 - 1/5 = 
a)
1/10
b)
1/3
c)
7/15
4.
3/5 - 3/10 = 
a)
3/10
b)
4/10
c)
5/10
5.
7/16 + 3/8 = 
a)
8/16
b)
10/16
c)
13/16
6.
8/9 - 5/6 = 
a)
4/18
b)
1/18
c)
3/18
7.
4/9 - 1/12 = 
a)
13/36
b)
15/36
c)
16/36
8.
1/18 + 5/6 = 
a)
5/9
b)
6/9
c)
8/9
9.
7/15 - 1/5 = 
a)
5/6
b)
4/15
c)
3/5
10.
7/8 - 1/6 = 
a)
17/24
b)
15/18
c)
12/24
11.
1/4 - 3/12 = 
a)
0
b)
4/12
c)
-1/4
12.
3/7 + 6/14 = 
a)
6/7
b)
12/14
c)
13/14
13.
What is a good common denominator for this problem?   1/2 +2/4 = 
a)
2
b)
4
c)
8
14.
What is a good common denominator for this problem?     3/9 + 1/3 = 
a)
9
b)
3
c)
12
15.
What is a good common denominator for this problem?    1/4 + 3/16 = 
a)
16
b)
4
c)
8
16.
What is a good common denominator for this question?    3/4 - 3/12 = 
a)
24
b)
20
c)
12
17.
What is a good common denominator for this problem?    3/9 + 1/6 = 
a)
18
b)
9
c)
24
18.
What is a good common denominator for this problem?  5/8 + 3/6 = 
a)
24
b)
18
c)
32
19.
What is a good common denominator for this problem?    5/10 + 2/15 = 
a)
20
b)
30
c)
15
20.
What is a good common denominator for this problem?   3/16 + 2/4 =
a)
24
b)
8
c)
16
WaygroundAnswer Key

Addition of Unlike Fractions

Total questions: 20

1.
a) 3/4
2.
c) 13/20
3.
b) 1/3
4.
a) 3/10
5.
c) 13/16
6.
b) 1/18
7.
a) 13/36
8.
c) 8/9
9.
b) 4/15
10.
a) 17/24
11.
a) 0
12.
a) 6/7
13.
b) 4
14.
a) 9
15.
a) 16
16.
c) 12
17.
a) 18
18.
a) 24
19.
b) 30
20.
c) 16

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FAQs

What does this worksheet cover?

This Grade 5–7 mathematics worksheet covers adding and subtracting unlike fractions using common denominators and equivalent fractions. Its 20 multiple-choice questions require students to solve fraction expressions and choose suitable common denominators, including for problems such as 4/9 − 1/12 and 1/4 + 3/16.

How can I use this worksheet to teach adding and subtracting unlike fractions?

Begin by modeling how to find a common denominator, convert each fraction to an equivalent fraction, and then combine the numerators while keeping the denominator. Use the worksheet’s common-denominator questions first, then have students solve the addition and subtraction items and explain why an option such as 4 is appropriate for 1/2 + 2/4.

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

Watch for students adding or subtracting denominators instead of finding a common denominator, or selecting a denominator that does not work for both fractions. Students may also convert only one fraction, overlook equivalent forms such as 3/10, or miss that 1/4 and 3/12 are equal, making their difference 0.

How do I assign and grade this unlike-fractions worksheet?

The worksheet is available as a printable PDF and as a digital quiz on Wayground, and it includes a complete answer key for all 20 multiple-choice questions. For printable submissions, you can grade student work by scanning it with the Wayground for Teachers app.

How can I differentiate this worksheet for my students?

In the worksheet’s Advanced Settings, adjust font spacing or font size to make the fraction expressions and answer choices easier to read. You can also enable a dyslexia-friendly font or translate the worksheet into another language while keeping its multiple-choice fraction practice format.

Where can I find more worksheets like this on Wayground?

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

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