Free Grade 3 Working with Compound Units Flashcards
Free Grade 3 flashcards for Working with Compound 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
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with compound units
Explain working with compound units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with compound units
Calculate working with compound units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with compound units
Compare working with compound units accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with compound units
Justify working with compound 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 Working with Compound 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 8 cm to mm.[1]
- 2.Convert 7 km to m.[1]
- 3.Convert 2 m to cm.[1]
- 4.Convert 3 L to mL.[1]
- 5.Convert 3.3 km to m.[2]
- 6.Convert 5.8 m to cm.[2]
- 7.Convert 3.6 m to cm.[2]
- 8.Convert 3.2 L to mL.[2]
- 9.Convert 8.5 m to cm.[3]
- 10.Convert 7.7 L to mL.[3]
- 11.Convert 2.8 L to mL.[3]
- 12.Convert 4.4 km to m.[3]
Show answers and working
1. 80 mm
1 cm = 10 mm. 8 × 10 = 80 mm.
2. 7000 m
1 km = 1000 m. 7 × 1000 = 7000 m.
3. 200 cm
1 m = 100 cm. 2 × 100 = 200 cm.
4. 3000 mL
1 L = 1000 mL. 3 × 1000 = 3000 mL.
5. 3300 m
1 km = 1000 m. 3.3 × 1000 = 3300 m.
6. 580 cm
1 m = 100 cm. 5.8 × 100 = 580 cm.
7. 360 cm
1 m = 100 cm. 3.6 × 100 = 360 cm.
8. 3200 mL
1 L = 1000 mL. 3.2 × 1000 = 3200 mL.
9. 850 cm
1 m = 100 cm. 8.5 × 100 = 850 cm.
10. 7700 mL
1 L = 1000 mL. 7.7 × 1000 = 7700 mL.
11. 2800 mL
1 L = 1000 mL. 2.8 × 1000 = 2800 mL.
12. 4400 m
1 km = 1000 m. 4.4 × 1000 = 4400 m.
Worked examples
Convert 7 m to cm.
- 1 m = 100 cm.
- 7 × 100 = 700 cm.
- Answer: 700 cm
Convert 1.9 km to m.
- 1 km = 1000 m.
- 1.9 × 1000 = 1900 m.
- Answer: 1900 m
Convert 1.8 kg to g.
- 1 kg = 1000 g.
- 1.8 × 1000 = 1800 g.
- Answer: 1800 g
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 Working with Compound Units
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Frequently asked
- Is this Grade 3 Working with Compound 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 Introducing Compound Units, Converting Units. 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 Working with Compound Units?
- Move on to Compound Units in Context, Metric Units, Imperial Units, Converting Units, which build directly on this idea.
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