How is this different from the 3rd grade version?

The bars are gone and the factors are bigger. Fourth graders work from the numbers alone, which is the reasoning 4.NF.A.1 asks for.

Is it always the numerator that's missing?

On this sheet, yes. Keeping the blank in one place makes the multiply-top-and-bottom habit automatic before anything else moves around.

4th grade equivalent fractions

4th grade equivalent fractions worksheets

Fourth grade shifts from bars to numbers: each problem is numeric, like 3/5 = ▢/20, with bigger factors than third grade used. Your child works out what the denominator was multiplied by and does the same to the numerator.

Free printable PDF worksheet, aligned to Common Core 4.NF.A.1.

Each print is a different sheet with its own answer key. You don't need to sign up.

The kind of problems you'll get

Complete each equivalent fraction.

7/8 = 28/
Answer: 32
1/5 = /20
Answer: 4
5/6 = 20/
Answer: 24

Every print pulls a fresh set of problems at this level, so a make-up test or a second sibling never gets the same sheet.

What's on a 4th grade sheet

The sample sheet above has 12 problems. Its answers run from 2 to 35. On the 3rd grade sample they run from 2 to 6. The 3rd grade sample has 8. This sheet is aligned to 4.NF.A.1. The 3rd grade sheet is aligned to 3.NF.A.3.b, 3.NF.A.3.c. This grade also prints equivalent fractions with models, equivalent fraction concepts, explaining equivalent fractions, matching equivalent fraction models, and tenths and hundredths, which 3rd grade does not.

Equivalent fractions: fluency practice. Complete each equivalent fraction. 12 problems per page.
Equivalent fractions with models. How many equal parts of the second bar must be shaded to match the first? Each bar is one whole. 6 problems per page.
Equivalent fraction concepts. Complete each problem. Use the models and show your reasoning where asked. 6 problems per page.
Explaining equivalent fractions. Explain each equivalence or give both scale factors. Use the same whole. 6 problems per page.
Matching equivalent fraction models. Choose the model that shows the same amount as the reference, using the same whole. 6 problems per page.
Tenths and hundredths. Complete each fraction or sum. Use the shaded model where shown. 8 problems per page.

Every version prints on US Letter or A4, with its answer key after the problems.

How to teach this

Ask "what did the bottom get multiplied by?" before anything else, and have your child write that little × 4 next to the equals sign so the step stays visible. Check a finished answer by simplifying it back: 12/20 should return to 3/5. If your child is guessing, cover the second denominator and let them build the new fraction themselves.

Watch for: Kids add the same number to the top and bottom, turning 1/2 into 2/3. Adding changes the fraction's size; only multiplying both parts keeps it. Kids multiply the bottom and copy the top across unchanged. Whatever the denominator was multiplied by, the numerator gets the same.

Common questions about 4th grade equivalent fractions

How is this different from the 3rd grade version?: The bars are gone and the factors are bigger. Fourth graders work from the numbers alone, which is the reasoning 4.NF.A.1 asks for.
Is it always the numerator that's missing?: On this sheet, yes. Keeping the blank in one place makes the multiply-top-and-bottom habit automatic before anything else moves around.

Related worksheets

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Aligned to Common Core 4.NF.A.1. Reviewed by the One more sheet team. Content version 241, updated September 2026.

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