3rd grade partitioning shapes into equal parts worksheets
Partitioning shapes into equal parts worksheets for 3rd grade print 5 problems per page. Complete each problem. Use the models and show your reasoning where asked. A unit fraction is one of the equal-sized parts of a whole.
Free printable PDF worksheet, aligned to Common Core 3.NF.A.1.
Each print is a different sheet with its own answer key. You don't need to sign up.
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The kind of problems you'll get
Complete each problem. Use the models and show your reasoning where asked.
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How can you show one fourth of a rectangle?
Answer: Divide it into four equal-area parts and mark one part.
Most problems on this sheet sit beside a picture, model or diagram, so this is the worked example the sheet itself prints. The answer key on page two prints the answer under every problem.
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
- Partitioning shapes into equal parts. Complete each problem. Use the models and show your reasoning where asked. 5 problems per page.
Every version prints on US Letter or A4, with its answer key after the problems.
This sheet is one of the versions on the 3rd grade unit fractions & parts of a whole page, with its own difficulty choices and its own answer key.
How to teach this
Before writing anything, ask two questions in order: "how many equal parts?" then "how many are shaded?" Bottom, then top, every time. When an answer comes out as 2/3 or 5/6, have your child point to each shaded part while counting the numerator aloud.
Watch for: Kids count the shaded parts for both numbers. The bottom counts all the equal parts, the top counts only the shaded ones. Kids assume a bigger bottom number means a bigger fraction. It is the other way round: more equal parts means smaller parts, so 1/8 is smaller than 1/2.
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Aligned to Common Core 3.NF.A.1. Reviewed by the One more sheet team. Content version 241, updated September 2026.
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