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

One paper per pupil

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

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.

1.8 m = ___ mm

2.8 cm = ___ mm

3.3 cm = ___ mm

4.9 m = ___ mm

5.7 cm = ___ mm

6.6 cm = ___ mm

7.2 m = ___ mm

8.10 cm = ___ mm

9.11 cm = ___ mm

10.4 cm = ___ mm

11.5 cm = ___ mm

12.6 m = ___ mm

LessonPrint · 4.MD.A.2 · Set 15 · free to copy for classroom use

Answer key — Convert Metric Lengths

Set 15. Prints on its own sheet.

1.8000
2.80
3.30
4.9000
5.70
6.60
7.2000
8.100
9.110
10.40
11.50
12.6000

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