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Adding and subtracting fractions with the same Denominator - Printable Mathematics Worksheets - Wayground

Adding and subtracting fractions with the same Denominator

23 questions

4th - 4th Grade

Mathematics

This Grade 4 mathematics worksheet gives students focused practice adding and subtracting fractions with the same denominator through 23 multiple-choice questions. Items include identifying whether a fraction addition is valid, finding sums and differences, rewriting fractions with common denominators, and interpreting answers such as 4/4, improper fractions, and mixed numbers. Several questions use everyday contexts, including pies, cupcakes, and class enrollment, so students connect fraction operations to parts of a whole and fractional amounts. The worksheet is designed for independent practice, review, or a quick formative assessment after instruction on fraction denominators and numerators. It helps teachers check whether students can keep the denominator unchanged when appropriate, operate on the numerators, and simplify or interpret results accurately. This is a free printable worksheet with a complete answer key for Grade 4 classrooms.

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Worksheets

Adding and subtracting fractions with the same Denominator

Total questions: 23

Name
Class
Date
1.


18+48\frac{1}{8}+\frac{4}{8}  

a)

516\frac{5}{16}  

b)

464\frac{4}{64}  

c)

58\frac{5}{8}  

d)

38\frac{3}{8}  

2.


25+35\frac{2}{5}+\frac{3}{5}  

a)

510\frac{5}{10}  

b)

15\frac{1}{5}  

c)

55\frac{5}{5}  

3.


45−25\frac{4}{5}-\frac{2}{5}  

a)

65\frac{6}{5}  

b)

20\frac{2}{0}  

c)

25\frac{2}{5}  

d)

210\frac{2}{10}  

4.


910−210\frac{9}{10}-\frac{2}{10}  

a)

710\frac{7}{10}  

b)

1110\frac{11}{10}  

c)

1120\frac{11}{20}  

d)

70\frac{7}{0}  

5.

Rewrite this problem with common denominators

13+25\frac{1}{3}+\frac{2}{5}  

a)

13+25\frac{1}{3}+\frac{2}{5}  

b)

13+23\frac{1}{3}+\frac{2}{3}  

c)

15+25\frac{1}{5}+\frac{2}{5}  

d)

515+615\frac{5}{15}+\frac{6}{15}  

e)

115+215\frac{1}{15}+\frac{2}{15}  

6.


18+48\frac{1}{8}+\frac{4}{8}  

a)

516\frac{5}{16}  

b)

464\frac{4}{64}  

c)

58\frac{5}{8}  

d)

38\frac{3}{8}  

7.


25+35\frac{2}{5}+\frac{3}{5}  

a)

510\frac{5}{10}  

b)

15\frac{1}{5}  

c)

55\frac{5}{5}  

8.


45−25\frac{4}{5}-\frac{2}{5}  

a)

65\frac{6}{5}  

b)

20\frac{2}{0}  

c)

25\frac{2}{5}  

d)

210\frac{2}{10}  

9.


910−210\frac{9}{10}-\frac{2}{10}  

a)

710\frac{7}{10}  

b)

1110\frac{11}{10}  

c)

1120\frac{11}{20}  

d)

70\frac{7}{0}  

10.
Is this a correct answer?
a)
Yes, the student correctly added.
b)
No, you cannot add unlike denominators
c)
No, 5 + 7 is not 12
d)
No, 2 + 3 is not 5
11.

John had a cake cut into 8 pieces. He ate the whole thing. What fraction did he eat?

a)

6/6

b)

8/8

c)

8/16

12.

What is 2/8 + 3/8 = ?

a)
b)
c)
13.
What is 3/4 + 1/4 = ?
a)
4/4 
b)
0/4
c)
2/4
d)
1/2
14.

What is the answer?

a)
b)
c)
d)
15.

7/7 - 5/7 = ?

a)
b)
c)
d)
16.
After a picnic, there is 3/8 of a blueberry pie, 2/8 of an apple pie, and 5/8 of a peach pie left over. How much total pie is there?
a)
8/8 or 1
b)
0/8 or 0
c)
1 4/8 or 1 1/2
d)
10/8 or 1 2/8 or 1 1/4
17.

What is the sum of these fractions?
25+15=\frac{2}{5}+\frac{1}{5}=  

a)

310\frac{3}{10}  

b)

35\frac{3}{5}  

c)

53\frac{5}{3}  

d)

225\frac{2}{25}  

18.

What is 1/8 + 5/8?

a)

1

b)

6/16 or 3/8

c)

6/8 or 3/4

d)

2/4 or 1/2

19.

What is 3/4 + 1/4?

a)

1 or 4/4

b)

3/4

c)

10/16 or 5/8

d)

1/4

20.

What is 5/6 + 4/6?

a)

4/6 or 2/3

b)

9/12 or 3/4

c)

3/4

d)

9/6 or 3/2 or 11/2

21.

What is 15/16 - 12/16?

a)

1/3

b)

4/16 or 1/4

c)

3/16

d)

2/16 or 1/8

22.

Dylan had a whole cupcake in his lunch bag. He ate 1/4 of it. How much does he have left?

a)

1/4

b)

1/2

c)

1/3

d)

3/4

23.
The 4th grade class has 32 students. There are 13 girls in the class. What fractional part of the class is boys?
a)
19/32
b)
13/32
c)
32/19
d)
32/13
Answer Key

Adding and subtracting fractions with the same Denominator

Total questions: 23

1.
c)

58\frac{5}{8}  

2.
c)

55\frac{5}{5}  

3.
c)

25\frac{2}{5}  

4.
a)

710\frac{7}{10}  

5.
d)

515+615\frac{5}{15}+\frac{6}{15}  

6.
c)

58\frac{5}{8}  

7.
c)

55\frac{5}{5}  

8.
c)

25\frac{2}{5}  

9.
a)

710\frac{7}{10}  

10.
b) No, you cannot add unlike denominators
11.
b)

8/8

12.
b)
13.
a) 4/4 
14.
a)
15.
c)
16.
d) 10/8 or 1 2/8 or 1 1/4
17.
b)

35\frac{3}{5}  

18.
c)

6/8 or 3/4

19.
a)

1 or 4/4

20.
d)

9/6 or 3/2 or 11/2

21.
c)

3/16

22.
d)

3/4

23.
a) 19/32

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FAQs

What does this worksheet cover about adding and subtracting fractions?

This Grade 4 worksheet uses 23 multiple-choice questions to practise adding and subtracting fractions with the same denominator. Students also identify when unlike denominators cannot be combined directly, solve fraction word problems, and recognize equivalent forms such as 4/4, 9/6, 3/2, and 1 1/2. Completing the items builds accuracy with numerator operations while reinforcing that the denominator represents equal-sized parts.

How can I use this worksheet to teach adding and subtracting fractions with the same denominator?

First model fractions as equal parts and show that, when denominators match, students add or subtract only the numerators while keeping the denominator. Use the worksheet’s incorrect-answer item about unlike denominators to prompt students to explain why the denominators cannot simply be added. Then have students solve the numerical questions before discussing the pie, cupcake, and class-size problems as applications of the same process.

What mistakes should I watch for on this fraction worksheet?

Watch for students adding the denominators, such as treating 2/8 + 3/8 as 5/16, or accepting an addition with unlike denominators without finding common denominators. Students may also leave answers unsimplified, confuse an improper fraction with its mixed-number equivalent, or subtract the wrong part in questions such as finding the cupcake remaining after 1/4 is eaten. In the class-size problem, check that students use the number of boys as the numerator rather than copying the number of girls.

How do I assign and grade this fractions worksheet?

The worksheet is available as a printable PDF and as a digital quiz on Wayground, with a complete answer key for all 23 multiple-choice questions. You can assign the digital version for automatic grading or print it for written practice; printable submissions can be graded by scanning student work with the Wayground for Teachers app. The printable option can also support classrooms that are reducing screen time.

How can I differentiate this worksheet for my students?

Use the worksheet’s Advanced Settings to adjust font spacing and font size so the fraction expressions and word problems are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language when appropriate. These changes can support access to the multiple-choice fraction calculations and contextual questions without changing the target skill.

Where can I find more free worksheets like this on Wayground?

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

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