4th grade mixed numbers & improper fractions worksheets

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Mixed numbers worksheets for fourth grade convert in both directions: improper fractions like 7/4 become 1 3/4, and mixed numbers like 2 1/3 become 7/3. The key idea: a fraction is a sum of smaller fractions, and wholes are just groups of same-size parts.

Free printable PDF worksheet, aligned to Common Core 4.NF.B.3.b.

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The kind of problems you'll get

Convert each mixed number to an improper fraction and each improper fraction to a mixed number.

  1. 1 2/3 =

    Answer: 5/3

  2. 1 1/3 =

    Answer: 4/3

  3. 4/3 =

    Answer: 1 1/3

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

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

How to teach this

Draw the wholes for the first few: 7/4 becomes one circle of four fourths plus three more fourths. For the return trip, say the multiply-then-add out loud ("two threes are six, plus one is seven") before writing 7/3. If the denominator changes during a conversion, stop right there; that's the error to fix.

Watch for: Kids write the leftover over the wrong number, turning 7/4 into 1 3/7. The remainder stays in fourths, so it sits over the original denominator. Kids add the whole number straight to the top, turning 2 1/3 into 3/3. The 2 is worth 6 thirds, so multiply by the bottom before adding.

Common questions about 4th grade mixed numbers & improper fractions

Which direction is harder for kids?
Usually mixed number to improper fraction, because it takes two steps: multiply, then add. The sheet mixes both directions so neither one gets rusty.
Is an improper fraction a wrong answer?
Not at all. 7/3 and 2 1/3 are the same number in different clothes, and fourth graders need to move between them freely.

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Aligned to Common Core 4.NF.B.3.b. Reviewed by the One more sheet team. Content version 241, updated September 2026.

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