Wayground
Adding Mixed Numbers - Printable Math Worksheets class 4 - Wayground

Adding Mixed Numbers

Miranda Webber

Created by Miranda Webber

20 questions

4th Grade

Math

Updated Oct 2026

Adding Mixed Numbers is a free Grade 4 mathematics worksheet that helps students add mixed numbers, work with common denominators, convert improper fractions to mixed numbers, and simplify results. The practice includes examples with like denominators, fraction models, and sums that require students to combine whole-number and fractional parts, including cases where the fractional sum forms an additional whole. The worksheet contains 20 questions: 17 multiple-choice items and 3 fill-in-the-blank items. Students review the requirements for adding mixed numbers, identify operations used to find a common denominator, interpret a fraction model, convert fractions such as 32/10 and 8/5 into mixed numbers, and solve mixed-number addition problems. This free printable worksheet includes a complete answer key, making it useful for independent practice, guided instruction, or a quick Grade 4 skills check.

Worksheet settings

Font size

S
M
L
XL
WaygroundWorksheets

Adding Mixed Numbers

Total questions: 20

Name
Class
Date
1.

5 25 + 2 35=5\ \frac{2}{5}\ +\ 2\ \frac{3}{5}=  

(a)  

2.

What is a requirement in order to add mixed numbers?

a)

Must have the same denominator.

b)

Must have the same numerator.

c)

Must turn into improper fractions.

d)

Must draw a picture of the fraction.

3.
Question Image

7 38+4 =7\ \frac{3}{8}+4\ =  

(a)  

4.

16 +18 56=16\ +18\ \frac{5}{6}=  

(a)  

5.

What two operations can be used to find a common denominator?

a)

addition and multiplication

b)

multiplication and subtraction

c)

division and addition

d)

multiplication and division

6.

After completing any fraction problem also check to see if you can do what?

a)

find a common denominator

b)

simplify

c)

add more to the numerator

d)

cancel numbers

7.

189+1891\frac{8}{9}+1\frac{8}{9}  

a)

3793\frac{7}{9}  

b)

216182\frac{16}{18}  

c)

21592\frac{15}{9}  

d)

31693\frac{16}{9}  

8.

Solve:

125+7151\frac{2}{5}+7\frac{1}{5}  

a)

83258\frac{3}{25}  

b)

8258\frac{2}{5}  

c)

35\frac{3}{5}  

d)

8358\frac{3}{5}  

9.

What is the sum?
 

3 15 +  2 25  =3\ \frac{1}{5}\ +\ \ 2\ \frac{2}{5\ }\ =  

a)

  5 355\ \frac{3}{5}  

b)

5 3105\ \frac{3}{10}  

10.
What is the mixed number that this model represents?

What is the mixed number that this model represents?

a)

3 5/8

b)

3 5/3

c)

3 3/5

d)

3 3/8

11.

32/10 = what as a mixed number?

a)

3 2/10

b)

2 2/10

c)

3/10

d)

3 1/10

12.

8/5 = what as a mixed number?

a)

1 2/5

b)

1 4/5

c)

1 1/5

d)

1 3/5

13.
4   1/3   + 2  1/3
a)
6  1/3
b)
6  2/3
c)
6  2/6
d)
7  2/3
14.
7  3/2 + 1  1/2
a)
10
b)
10  1/2
c)
11
d)
11  1/2
15.

12 8/9 + 3 4/9=

a)

15 3/9

b)

16 1/3

c)

17 3/9

d)

16 3/7

16.

2 3/8 + 5 7/8

a)

8 1/2

b)

7 3/4

c)

33/4

d)

8 1/4

17.
4   1/3   + 2  1/3
a)
6  1/3
b)
6  2/3
c)
6  2/6
d)
7  2/3
18.
2  7/8  + 2  4/8
a)
4 2/8
b)
4  3/8
c)
5 3/8
d)
5  2/8
19.
3  4/5  + 4  3/5
a)
7  2/5
b)
8  2/5
c)
6  3/5
d)
8  9/5
20.
9  1/2  +  7  1/2
a)
17
b)
16
c)
14  1/2
d)
16  1/2
WaygroundAnswer Key

Adding Mixed Numbers

Total questions: 20

1.
8
2.
a)

Must have the same denominator.

3.
11 3/8
4.
34 5/6
5.
d)

multiplication and division

6.
b)

simplify

7.
a)

3793\frac{7}{9}  

8.
d)

8358\frac{3}{5}  

9.
a)

  5 355\ \frac{3}{5}  

10.
a)

3 5/8

11.
a)

3 2/10

12.
d)

1 3/5

13.
b) 6  2/3
14.
a) 10
15.
b)

16 1/3

16.
d)

8 1/4

17.
b) 6  2/3
18.
c) 5 3/8
19.
b) 8  2/5
20.
a) 17

Browse by subjects

Browse by grades

Browse by format

FAQs

What does the Adding Mixed Numbers worksheet cover?

This Grade 4 worksheet focuses on adding mixed numbers, especially identifying a common denominator, converting improper fractions to mixed numbers, and simplifying final answers. Its 20 items combine multiple-choice and fill-in-the-blank questions, including fraction-model interpretation, conversions such as 32/10 and 8/5, and mixed-number sums that may require regrouping.

How can I use this worksheet to teach adding mixed numbers?

Begin by reviewing why the fractional parts need a common denominator, then model how to add the whole-number and fractional parts separately. Use the conversion items and fraction-model question to connect improper fractions with mixed numbers before students solve the addition items; pause to discuss examples such as 2 3/8 + 5 7/8, where the fractional sum creates another whole.

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

Watch for students adding fractions with unlike denominators, treating the numerator or denominator as the part that must match, or choosing an unnecessary operation when finding a common denominator. In the conversion items, students may confuse the quotient and remainder, and in the addition problems they may fail to regroup when the fractional parts total at least one whole or leave an answer unsimplified.

How do I assign and grade this Adding Mixed Numbers worksheet?

The worksheet is available as a printable PDF and as a digital quiz on Wayground, with a complete answer key for all 20 questions. You can grade printable submissions by scanning student work with the Wayground for Teachers app, or review responses from the digital quiz.

How can I differentiate this mixed-number addition worksheet for my students?

Use the worksheet’s Advanced Settings to adjust font spacing or font size so the mixed-number expressions and multiple-choice options are easier to read. You can also enable a dyslexia-friendly font or translate the worksheet into another language when those changes support access to the fraction conversions and addition problems.

Where can I find more 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.

© 2026 Wayground Inc.

Accessibility and Inclusion