Measurement
Reading a metric ruler
Read eight marked endpoints on 10 cm scale windows that may begin from 1 cm through 89 cm, using increments from 1 cm to 0.5 mm.
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Measuring in centimeters or millimeters
Measure eight actual-size line segments up to 15 cm, with whole-centimeter, half-centimeter and millimeter categories plus optional rulers and cm/mm answers.
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Print at 100% / Actual size and disable Fit to page, then measure each line.
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Customize this worksheetLearning objective
What this activity builds
Measure a physical segment accurately and state the same metric length in the requested unit.
Worked example
A line is 8.5 cm long. What is its length in millimeters?
85 mm
Each centimeter has 10 millimeters, so 8.5 × 10 = 85. The line geometry is unchanged when the answer unit changes.
Teaching notes
Make the practice count
- Begin with whole centimeters before mixing in half centimeters and individual millimeters.
- Show the ruler when learners need help aligning zero with the segment start.
- Use the 5 cm calibration line to confirm actual-size printing.
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A useful next step
Related activities
Measurement
Metric unit conversions
Practice twenty exact decimal conversions from 0.01 through 999,990 across any nonempty subset of ten metric length, capacity and mass pairs, in both directions.
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