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Perimeter of Bigger Rectangles is a free printable Grade 3 math worksheet on perimeter with larger side lengths, aligned to Common Core standard 3.MD.D.8. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 9 of 25 · the same problems every time you open this link.

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One paper per student

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Perimeter of Bigger Rectangles

3.MD.D.8

NameDate

Work out the perimeter.

1.
Sides 21 and 23. Perimeter =
2.
Sides 23 and 14. Perimeter =
3.
Sides 16 and 20. Perimeter =
4.
Sides 20 and 23. Perimeter =
5.
Sides 12 and 23. Perimeter =
6.
Sides 19 and 22. Perimeter =
7.
Sides 14 and 12. Perimeter =
8.
Sides 24 and 20. Perimeter =

LessonPrint · 3.MD.D.8 · Set 9 · free to copy for classroom use

Answer key — Perimeter of Bigger Rectangles

Set 9. Prints on its own sheet.

  1. 1.88 units
  2. 2.74 units
  3. 3.72 units
  4. 4.86 units
  5. 5.70 units
  6. 6.82 units
  7. 7.52 units
  8. 8.88 units

More practice for 3.MD.D.8

Find the distance around a shape.

Teaching this next? Perimeter of Polygons is the 45-minute plan for it, with the misconceptions to expect.

All Grade 3 worksheets

Last reviewed 2026-09-05. Aligned to 3.MD.D.8 of the Common Core State Standards for Mathematics.