Grade 4/Measurement
Convert Meters, Centimeters, and Millimeters (670)
Multi-step conversions between meters, centimeters, and millimeters. Students learn that 100 centimeters equals 1 meter and 1000 millimeters equals 1 meter, working with larger numbers like converting 8,000 centimeters to 80 meters.
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Quick Tip
10 mm = 1 cm | 100 cm = 1 m
Teacher Resources
Teaching Notes
100 cm = 1 m, 1000 mm = 1 m, 10 mm = 1 cm. Students work with three related units. Pattern: all powers of 10.
Vocabulary
Meter: A metric unit of length.
Centimeter: A metric unit of length, 100 per meter.
Millimeter: A metric unit of length, 1000 per meter.
Common Mistakes
- Mixing up 100 and 1000
- Forgetting intermediate conversions
- Incorrect conversion factor (100 vs 1000).
- Multiplying instead of dividing (or vice versa).
- Misplacing the decimal point.
- Not completing all conversion steps.
Differentiation
SupportProvide conversion ladder. Do two steps: meters→cm→mm.
ChallengeDirect conversions (meters to mm). Multi-step word problems.
Discussion Questions
- How are all metric conversions related?
- Why use meters vs centimeters?
- Why is the metric system helpful globally?
- When might you need to convert units in daily life?
- How does place value relate to metric conversions?
- What is the relationship between mm, cm, and m?
Extension Activities
- Create metric conversion chart
- Measure large and small objects
Parent Tip
Use a tape measure to show your child how meters, centimeters, and millimeters relate.
Learning Path
Skill Cluster
Measurement & Data
Estimated Time
15 minutes
Skills Practiced
three unit metricmeters conversionmetric mastery
Prerequisites
- 668
- 669
- Understanding Place Value
- Multiplication and Division by 10, 100, 1000
Next Steps
- Metric Conversions with Decimals
- Solving Multi-Step Measurement Problems
- Convert Kilometers and Meters
- Metric Weight Conversions
- Metric Capacity Conversions