Free Grade 3 Introducing Metric Units Flashcards
Free Grade 3 flashcards for Introducing Metric Units: 12 real questions with a full answer key and worked solutions. Metric units change by powers of 10: 10 mm in a cm, 100 cm in a m, 1000 m in a km. Multiply to convert to a smaller unit, divide to convert to a bigger one.
Free
Foundation
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing metric units
Explain introducing metric units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing metric units
Calculate introducing metric units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing metric units
Compare introducing metric units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing metric units
Justify introducing metric units accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introducing Metric Units works
Metric units change by powers of 10: 10 mm in a cm, 100 cm in a m, 1000 m in a km. Multiply to convert to a smaller unit, divide to convert to a bigger one.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Convert 4 m to cm.[1]
- 2.Convert 9 km to m.[1]
- 3.Convert 8 kg to g.[1]
- 4.Convert 4 cm to mm.[1]
- 5.Convert 9.9 cm to mm.[2]
- 6.Convert 7.5 m to cm.[2]
- 7.Convert 6.4 kg to g.[2]
- 8.Convert 8.7 kg to g.[2]
- 9.Convert 6.9 m to cm.[3]
- 10.Convert 9.2 kg to g.[3]
- 11.Convert 6.1 km to m.[3]
- 12.Convert 3.7 km to m.[3]
Show answers and working
1. 400 cm
1 m = 100 cm. 4 × 100 = 400 cm.
2. 9000 m
1 km = 1000 m. 9 × 1000 = 9000 m.
3. 8000 g
1 kg = 1000 g. 8 × 1000 = 8000 g.
4. 40 mm
1 cm = 10 mm. 4 × 10 = 40 mm.
5. 99 mm
1 cm = 10 mm. 9.9 × 10 = 99 mm.
6. 750 cm
1 m = 100 cm. 7.5 × 100 = 750 cm.
7. 6400 g
1 kg = 1000 g. 6.4 × 1000 = 6400 g.
8. 8700 g
1 kg = 1000 g. 8.7 × 1000 = 8700 g.
9. 690 cm
1 m = 100 cm. 6.9 × 100 = 690 cm.
10. 9200 g
1 kg = 1000 g. 9.2 × 1000 = 9200 g.
11. 6100 m
1 km = 1000 m. 6.1 × 1000 = 6100 m.
12. 3700 m
1 km = 1000 m. 3.7 × 1000 = 3700 m.
Worked examples
Convert 5 cm to mm.
- 1 cm = 10 mm.
- 5 × 10 = 50 mm.
- Answer: 50 mm
Convert 3.1 km to m.
- 1 km = 1000 m.
- 3.1 × 1000 = 3100 m.
- Answer: 3100 m
Convert 9.3 L to mL.
- 1 L = 1000 mL.
- 9.3 × 1000 = 9300 mL.
- Answer: 9300 mL
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Divides when converting to a smaller unit.
Correction: Smaller units mean more of them — multiply.
Uses 100 for every conversion.
Correction: Learn which pairs use 10, 100 or 1000.
Teacher tips
- · Keep a conversion staircase on the wall.
Parent tips
- · Weigh fruit at the shop and convert kg to g.
Real-life applications
- · Cooking, measuring height, reading road signs.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
Every free resource for Introducing Metric Units
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Frequently asked
- Is this Grade 3 Introducing Metric Units flashcards really free?
- Yes. Every flashcards on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Geometry. Each one has its own free lesson, worksheet and quiz.
- How is the flashcards sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introducing Metric Units?
- Move on to Working with Metric Units, Metric Units in Context, Imperial Units, Converting Units, which build directly on this idea.
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