Grade 3/Measurement
Compare Metric Weights (980)
Compare metric weights using <, >, or =.
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Quick Tip
1,000 mg (milligram) = 1 g (gram) | 1,000 g = 1 kg (kilogram) | 1,000 kg = 1 t (metric ton)
Teacher Resources
Teaching Notes
This collection focuses on compare metric weights. Ensure students understand the base-10 nature of the metric system.
Vocabulary
Compare: To look at two things to see how they are alike or different.
Weight: How heavy something is.
Common Mistakes
- Confusing the conversion factors (e.g., 1000 vs 100)
- Multiplying instead of dividing or vice versa
- Forgetting to label units
- Forgetting to convert units
- Incorrect conversion factor (e.g., 1kg = 100g)
- Comparing numbers directly without conversion
Differentiation
SupportProvide a conversion chart. Use concrete examples like a paperclip (1 g) or a textbook (1 kg).
ChallengeChallenge students to convert across multiple steps (e.g., mg to kg).
Discussion Questions
- Why is the metric system easier to use than customary units?
- When would you use kilograms instead of grams?
- How does multiplying by 1000 change a number?
- Why is it important to have common units for measurement?
- When might you use kilograms vs. grams in real life?
- How does converting units help us compare different measurements?
- Can we compare 2 kg and 2000 g without converting?
Extension Activities
- Weigh objects in the classroom.
- Estimate weights before measuring.
- Compare weights of different items.
Parent Tip
Have your child compare the weights of different fruits or vegetables at the store.
Learning Path
Skill Cluster
Measurement
Estimated Time
15 minutes
Skills Practiced
compare metric weights
Prerequisites
- 979
- Understand metric units of mass
- Basic multiplication and division
Next Steps
- Solve word problems with metric weights
- Convert between metric units of length
- Convert Metric Units
- Metric Weight Word Problems