Is there an answer key?

Yes. Every worksheet has a matching answer key with each answer worked on the same grid or layout as the question. The worksheet code printed at the bottom of each page pairs a sheet with its key.

My child wrote 6/4 instead of 1 1/2. Is that wrong?

6/4 and 1 1/2 are the same amount. These problems ask for a mixed number when the answer is greater than 1, and for simplest form, so 1 1/2 is the form to practise.

Why regroup 3 1/4 before subtracting 3/4?

You cannot take 3 fourths from 1 fourth. Breaking a whole into 4 fourths makes 5 fourths, and 5 is enough to subtract 3. One whole is left from the 3, along with 2 fourths.

How many different versions are there?

About a million per skill. Each time you press the button the problems are generated fresh, so you can print a different version for every student, a retake, or another night of practice.

Are the worksheets free?

Yes. They are free to print and copy for your home or classroom, with no sign-up.

4th Grade Add and Subtract Fractions with Like Denominators Worksheets

Fresh practice, ready to print. Answer key included.

Adding and subtracting fractions with the same denominator, then mixed numbers. Subtracting mixed numbers includes regrouping, such as 3 1/4 − 1 3/4. Answers are in simplest form, and greater than 1 as mixed numbers.

Problems per section

Or start with a ready-made version.

Open worksheet (PDF)Open answer key (PDF)

4th Grade Add and Subtract Fractions with Like Denominators Worksheets: page 1 of a free printable 4th grade math worksheet — Page 1 of a sample worksheet

What's on the worksheet

Adding fractions
Same denominator, such as 2/8 + 2/8 = 1/2 and 3/4 + 3/4 = 1 1/2.
Subtracting fractions
Same denominator, such as 5/6 − 1/6 = 2/3.
Adding mixed numbers
Same denominator, such as 2 1/4 + 1 1/4 = 3 1/2.
Subtracting mixed numbers
Regrouping, such as 3 1/4 − 1 3/4 = 1 1/2.
Mixed practice
Addition and subtraction of fractions and mixed numbers together.

How it works: a quick refresher

The rules this worksheet practices, then one problem worked from start to finish.

Strategy	How it works
Add the numerators	The denominator stays the same. 2/8 + 3/8 = 5/8.
Subtract the numerators	5/6 − 1/6 = 4/6, which simplifies to 2/3.
Simplify at the end	Divide the numerator and the denominator by a common factor. 2/8 + 2/8 = 4/8 = 1/2.
Greater than 1	3/4 + 3/4 = 6/4. That is 1 whole and 1/2 left over, written 1 1/2.
Regroup a mixed number	3 1/4 − 1 3/4 needs a whole. 3 1/4 = 2 5/4, and 2 5/4 − 1 3/4 = 1 1/2.

Worked example

Find 3 1/4 − 1 3/4.

11/4 is smaller than 3/4, so regroup 3 1/4 as 2 5/4.
2Subtract the fractions: 5/4 − 3/4 = 2/4.
3Subtract the whole numbers: 2 − 1 = 1, so the difference is 1 2/4.
42/4 simplifies to 1/2. 3 1/4 − 1 3/4 = 1 1/2.

Ready-made versions

Three fixed versions you can link to or share. Each is a PDF with its own answer key.

4th Grade Add and Subtract Fractions with Like Denominators Worksheets, version 1Worksheet PDF Answer key PDF
4th Grade Add and Subtract Fractions with Like Denominators Worksheets, version 2Worksheet PDF Answer key PDF
4th Grade Add and Subtract Fractions with Like Denominators Worksheets, version 3Worksheet PDF Answer key PDF

Grade level and standard

Written for 4th grade math (fractions) and aligned to CCSS 4.NF.B.3. It also works as review in later grades.

Common questions

Is there an answer key?: Yes. Every worksheet has a matching answer key with each answer worked on the same grid or layout as the question. The worksheet code printed at the bottom of each page pairs a sheet with its key.
My child wrote 6/4 instead of 1 1/2. Is that wrong?: 6/4 and 1 1/2 are the same amount. These problems ask for a mixed number when the answer is greater than 1, and for simplest form, so 1 1/2 is the form to practise.
Why regroup 3 1/4 before subtracting 3/4?: You cannot take 3 fourths from 1 fourth. Breaking a whole into 4 fourths makes 5 fourths, and 5 is enough to subtract 3. One whole is left from the 3, along with 2 fourths.
How many different versions are there?: About a million per skill. Each time you press the button the problems are generated fresh, so you can print a different version for every student, a retake, or another night of practice.
Are the worksheets free?: Yes. They are free to print and copy for your home or classroom, with no sign-up.

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