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Convert Metric Lengths is a free printable Grade 4 maths worksheet on converting between centimetres and millimetres, aligned to Common Core standard 4.MD.A.2. It prints 12 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 22 of 25 · the same problems every time you open this link.

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

Convert Metric Lengths

4.MD.A.2

NameDate

Fill in the missing number.

1.3 m = ___ mm
2.6 m = ___ mm
3.2 cm = ___ mm
4.12 cm = ___ mm
5.7 m = ___ mm
6.5 m = ___ mm
7.7 cm = ___ mm
8.10 m = ___ mm
9.9 m = ___ mm
10.12 m = ___ mm
11.2 m = ___ mm
12.9 cm = ___ mm

LessonPrint · 4.MD.A.2 · Set 22 · free to copy for classroom use

Answer key — Convert Metric Lengths

Set 22. Prints on its own sheet.

  1. 1.3000
  2. 2.6000
  3. 3.20
  4. 4.120
  5. 5.7000
  6. 6.5000
  7. 7.70
  8. 8.10000
  9. 9.9000
  10. 10.12000
  11. 11.2000
  12. 12.90

Last reviewed 2026-09-05. Aligned to 4.MD.A.2 of the Common Core State Standards for mathematics.