Grade 3/Measurement
🧪 Convert Kilograms and Grams
Practice converting between kilograms and grams. Students learn that 1000 grams equals 1 kilogram, building understanding of metric weight units through systematic conversion exercises with whole numbers.
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Prerequisites
What to Do Next
Practice Questions
- 3000 g = ? kg
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3 kg
- 5 kg = ? g
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5000 g
- 2500 g = ? kg ? g
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2 kg 500 g
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Quick Tip
1 kilogram (kg) = 1,000 grams (g)
Teacher Resources
Teaching Notes
1000 grams = 1 kilogram. Compare to customary: 1000 is easier than 16! Students see advantage of metric system.
Vocabulary
Gram (g): A metric unit of mass.
Kilogram (kg): A metric unit of mass, 1000 g.
Common Mistakes
- Place value errors with 1000
- Confusing with other metric units
- Confusing multiplication/division
- Incorrect conversion factor (e.g., 100)
- Forgetting units in answers
- Adding instead of converting
Differentiation
SupportUse place value chart. Pattern: move decimal 3 places.
ChallengeCompare efficiency of metric vs customary. Multi-step conversions.
Discussion Questions
- Why is 1000 easier than 16?
- What do scientists use?
- When do we use kilograms, and when grams?
- What is the relationship between kilograms and grams?
- Can you estimate a pet's weight in kg or g?
- How is metric length conversion similar to mass?
Extension Activities
- Compare metric scales
- Research metric adoption worldwide
Parent Tip
Help your child find the mass of objects in grams and kilograms using a scale.
Learning Path
Skill Cluster
Measurement - Metric System
Estimated Time
12 minutes
Skills Practiced
Metric weightKilograms gramsPowers of 1000