Year 3 - Maths
Converting between metres and centimetres
Measuring length and recording in tables
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will continue to measure using appropriate tools and units progressing to using a wider range of measures, including comparing and using mixed units.
Lesson Summary
You will learn to convert between metres and centimetres.
Key Notes
- Using the known fact that 100 cm are equivalent to 1 m can help us convert between cm and m.
- Partitioning and using the relationship between 1 m and 100 cm can help us convert between cm, and m and cm.
- It is always important to estimate so you know if your answer is near to the real value.
Vocabulary To Learn
- equivalent: When something is equivalent, it is equal in value.
- convert: When we convert, we change the unit of measurement between metres and centimetres, but the value remains the same.
Common Mistakes To Avoid
- Some children may think that 300 cm is bigger than 3 m because 300 is a bigger number than 3.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Using the known fact that 100 cm are equivalent to 1 m can help us convert between cm and m. Partitioning and using the relationship between 1 m and 100 cm can help us convert between cm, and m and cm.
2. Use this key word in a maths sentence and explain it clearly. 'equivalent'
When something is equivalent, it is equal in value. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Some children may think that 300 cm is bigger than 3 m because 300 is a bigger number than 3. Correction: 1 m is equivalent to 100 cm. So 3 m is equivalent to 300 cm. 3 m and 300 cm are equal in length or height.
More Lessons In This Unit
- Converting between centimetres and millimetres Study Guide
- Estimate and measure lengths and heights and record in a table Study Guide
- Estimate in metres and describe a metre in different ways Study Guide
- Measure length and height from zero using whole m or cm Study Guide
- Measuring length and height using cm and mm Study Guide
- Millimetres as a unit of measure and the relationship between them and cm Study Guide
- Solve problems involving length Study Guide
- Solve problems involving length and height Study Guide
- Using graphs to represent lengths and heights Study Guide
Browse all guides in the Year 3 Maths guide library.