Year 5 - Maths
Use known facts to derive common conversions over 1
Converting units
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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 apply memorised unit conversions to convert between units of measure and solve problems involving converting between units of time and money.
Lesson Summary
You will learn to use known facts to derive common conversions over 1.
Key Notes
- If 1 km is equal to one lot of 1,000 m, then 3 km is equal to three lots of 1,000 m, which is 3,000 m
- If 1 l = 1,000 ml, then 4 l = 4 x 1,000 ml = 4,000 ml
Vocabulary To Learn
- Equivalent: When two or more things have the same value.
- Convert: Change a value or expression from one form to another.
Common Mistakes To Avoid
- Pupils may see, for example, 3.25 kg and convert it to 3 kg and 25 g rather than 3 kg and 250 g.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
If 1 km is equal to one lot of 1,000 m, then 3 km is equal to three lots of 1,000 m, which is 3,000 m. If 1 l = 1,000 ml, then 4 l = 4 x 1,000 ml = 4,000 ml.
2. Use this key word in a maths sentence and explain it clearly. 'Equivalent'
When two or more things have the same value. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may see, for example, 3.25 kg and convert it to 3 kg and 25 g rather than 3 kg and 250 g. Correction: The lesson presents fractions and decimals as parts of whole circles. As long as pupils know that 1 kg = 1,000 g, they should see from the representation that 0.25 kg = 250 g as 250 + 250 + 250 + 250 = 1,000.
More Lessons In This Unit
- Convert between miles and kilometres and pounds and Euro Study Guide
- Convert from larger to smaller units of measure Study Guide
- Convert from smaller to larger units of measure Study Guide
- Convert to and from fraction and decimal quantities of larger units Study Guide
- Solve problems involving converting between units of time Study Guide
- Solve problems involving converting units in different contexts Study Guide
- Solve problems involving different units of measure Study Guide
- Understand approximate equivalence between metric and imperial units Study Guide
- Use known facts to carry out conversions that correspond to 10 and 100 parts Study Guide
Browse all guides in the Year 5 Maths guide library.