4th grade fraction of a number worksheets

Fraction of a number worksheets for fourth grade ask questions like 1/4 of 20, leaning on unit fractions, one part at a time. Divide by the denominator to find that single part; answers come out whole every time.

Free printable PDF worksheet, aligned to Common Core 4.NF.B.4.b.

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The kind of problems you'll get

Find the fraction of each number.

  1. 1/5 of 40 =

    Answer: 8

  2. 1/2 of 14 =
  3. 1/3 of 27 =

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 each sheet

Every version prints on US Letter or A4, with its answer key on the last page.

How to teach this

Make it physical once: deal 20 beans into 4 equal piles, and 1/4 of 20 is just one pile. Then say the move as a rule: "of a number means divide by the bottom." If dividing is shaky, keep a multiplication facts sheet nearby, because this skill is only as fast as the facts under it.

Watch for: Kids divide by the top number instead of the bottom. The denominator says how many equal parts to cut, so divide by it first. Kids stop after the dividing step: 18 ÷ 3 only finds one third, and 2/3 needs that result multiplied by 2.

Common questions about fraction of a number

Why do 4th grade problems mostly use fractions with 1 on top?
Unit fractions isolate the core move: divide to find one part. Once 1/4 of 20 is automatic, 3/4 of 20 is just one more multiplication.
Will the division always come out even?
Yes. Numbers are chosen so every answer is whole. The point here is fraction reasoning, not remainders.

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Aligned to Common Core 4.NF.B.4.b. Reviewed by the One more sheet curriculum team. Content version 123, updated July 2026.