Metric Measurement Worksheets: Centimeters (cm), Millimeters (mm ... - Free Printable

Let’s solve the problems step by step.

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First, look at the table:
We need to convert centimeters (cm) to millimeters (mm).
Remember: 1 cm = 10 mm
So to go from cm to mm, multiply by 10.

Table values:
- 1 cm → ? mm → 1 × 10 = 10 mm
- 3 cm → ? mm → 3 × 10 = 30 mm
- 12 cm → ? mm → 12 × 10 = 120 mm
- 40 cm → ? mm → 40 × 10 = 400 mm
- 145 cm → ? mm → 145 × 10 = 1,450 mm

✔ So the completed table is:

| centimeters | 1 | 3 | 12 | 40 | 145 |
|-------------|-----|-----|-----|-----|------|
| millimeters | 10 | 30 | 120 | 400 | 1450 |

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Next: Circle the greater length for each pair.

a. 4 cm vs 45 mm
Convert 4 cm to mm: 4 × 10 = 40 mm
Compare: 40 mm vs 45 mm → 45 mm is greater

c. 800 cm vs 1,000 mm
Convert 800 cm to mm: 800 × 10 = 8,000 mm
Compare: 8,000 mm vs 1,000 mm → 800 cm is greater

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Now, measure objects to nearest centimeter and millimeter using rulers shown.

For the screw (measure to nearest cm):
The screw starts at 0 cm and ends just past 6 cm — looks like about 6.2 cm? But we’re told to round to nearest centimeter.
Since it’s closer to 6 than to 7 → 6 cm

Wait — actually, looking again: the tip of the screw lines up with the 6 cm mark exactly? Or slightly beyond? In most such worksheets, if it’s right on or very close, you take that number. Let’s say it ends at 6.0 cm → so 6 cm

But let me double-check — in the image, the screw goes from 0 to just before 6.5? Actually, no — standard ruler reading: if the end is between 6 and 7, and closer to 6, then 6 cm. If it’s halfway or more, round up. Since it’s not specified precisely, but typically in these exercises, they align nicely. Let’s assume it’s 6 cm.

Actually — wait! The problem says “Measure to the nearest centimeter” for the screw. Looking at the ruler under the screw: the head is at 0, the tip is at approximately 6.2 cm? That would still round to 6 cm.

But let’s be precise — if the tip is at 6.2, nearest cm is 6. If it were 6.5 or above, it’d be 7. So yes — 6 cm

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Now for the “Measuring Millimeters” section:

a. Green pen:
Starts at 0 cm, ends at 14.5 cm? Wait — look at the ruler: the pen tip is at 14.5 cm? But we need to measure to nearest millimeter.

Ruler shows cm and mm marks. Each cm has 10 small lines = mm.

Pen starts at 0.0 cm, ends at 14.5 cm → which is 145 mm.

Wait — let’s count: from 0 to 14 cm is 140 mm, plus half a cm = 5 mm → total 145 mm.

But is it exactly at 14.5? Yes, looks like it. So 145 mm

b. Purple crayon:
Starts at 0, ends at... let’s see — the tip is at 7.2 cm? Because after 7 cm, there are 2 small lines → 7.2 cm = 72 mm.

Check: 7 cm = 70 mm, plus 2 mm = 72 mm

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Final Answers Summary:

Table:
- 1 cm → 10 mm
- 3 cm → 30 mm
- 12 cm → 120 mm
- 40 cm → 400 mm
- 145 cm → 1450 mm

Circle greater:
a. 45 mm
c. 800 cm

Screw (nearest cm): 6 cm
Pen (nearest mm): 145 mm
Crayon (nearest mm): 72 mm

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Final Answer:
Completed table:
millimeters row: 10, 30, 120, 400, 1450

Greater lengths:
a. 45 mm
c. 800 cm

Measurements:
Screw: 6 cm
Pen: 145 mm
Crayon: 72 mm