Year 5 - Maths
Converting units of mass and capacity
Calculating with decimal fractions
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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 explain the effect of multiplying and dividing a number by 10, 100 and 1,000 and use their knowledge of multiplying decimal fractions by whole numbers to solve measures problems.
Lesson Summary
You will learn to use knowledge of multiplication and division by 10, 100, 1,000 to convert units of mass and capacity.
Key Notes
- There are 1,000 ml in 1 l
- There are 1.000 g in 1 kg
- There are 10 dl in 1 l
- There are 100 cl in 1 l
- We can use knowledge of multiplying and dividing by 10, 100 and 1,000 to convert between units of mass and capacity.
Vocabulary To Learn
- Mass: Mass is a measure of how much matter there is in an object. It is commonly measured in kilograms (kg) or grams (g).
- Capacity: Capacity is a measure of the amount that something can hold. It is commonly measured in litres (l) or millilitres (ml).
Common Mistakes To Avoid
- Children may confuse when to multiply or when to divide when converting between units of measure.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
There are 1,000 ml in 1 l. There are 1.000 g in 1 kg.
2. Use this key word in a maths sentence and explain it clearly. 'Mass'
Mass is a measure of how much matter there is in an object. It is commonly measured in kilograms (kg) or grams (g). Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children may confuse when to multiply or when to divide when converting between units of measure. Correction: Encourage children to think about which unit of measure is greater e.g. kg are greater than g. In a given amount, there will be fewer of the greater unit so we need to divide.
More Lessons In This Unit
- Converting units of length Study Guide
- Divide decimal fractions by 1-digit numbers Study Guide
- Divide decimal fractions by 1-digit numbers using written methods Study Guide
- Explain how to multiply and divide a number by 10, 100 and 1,000 Study Guide
- Multiply 1-digit numbers by decimal fractions using written methods Study Guide
- Multiply 1-digit numbers by decimals Study Guide
- Multiply hundredths by whole numbers Study Guide
- Multiply tenths by whole numbers Study Guide
- Multiplying and dividing a number by 10, 100 and 1,000 Study Guide
- Multiplying and dividing a number by 10, 100 and 1,000 including bridging 1 Study Guide
- Predicting the size of a product Study Guide
- Solve measures problems using knowledge of multiplying decimal fractions Study Guide
- The relationship between multiplying by 0.01 and dividing by 100 Study Guide
- The relationship between multiplying by 0.1 and dividing by 10 Study Guide
Browse all guides in the Year 5 Maths guide library.