Year 3 - Maths
Solve problems involving mass
Measures: mass and capacity
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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 use weighing scales up to 1kg and measuring tools for volume and capacity up to 1 litre. They will measure mass from 0 to above 1kg using whole kg and grams and measure volume from 0 to above 1 litre using whole litres and ml.
Lesson Summary
You will learn to solve problems involving mass.
Key Notes
- Visualising a word problem helps us see the mathematics.
- Word problems can be represented as a bar model by identifying the parts and the whole.
- The bar model helps us to understand the structure of the maths and to form a calculation to help solve the problem.
- Number facts can be used when solving problems involving mass.
Vocabulary To Learn
- Bar model: A bar model is a pictorial representation of a problem where bars are used to represent the known and unknown quantities.
- Whole: The whole is all of something. It is complete.
- Part: A part is some but not all of something. It is an amount or section which, when combined with others, makes up the whole.
- Mass: Mass is a measure of how much matter something contains. It is measured by how much something weighs. Mass can be measured in kg and g.
Common Mistakes To Avoid
- Children may misidentify the parts or wholes in a problem.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Visualising a word problem helps us see the mathematics. Word problems can be represented as a bar model by identifying the parts and the whole.
2. Use this key word in a maths sentence and explain it clearly. 'Bar model'
A bar model is a pictorial representation of a problem where bars are used to represent the known and unknown quantities. 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 misidentify the parts or wholes in a problem. Correction: Children should be encouraged to visualise the problem (eg. act it out or draw it) to help them identify the parts and whole.
More Lessons In This Unit
- Become familiar with scales with different intervals when measuring in grams Study Guide
- Comparing and estimating mass and volume Study Guide
- Estimate then measure mass and volume and record in a table Study Guide
- Measure mass in whole kilograms and grams Study Guide
- Measure the mass of objects using grams Study Guide
- Measure volume in whole litres and millilitres Study Guide
- Measuring the volume of liquids using millilitres. Study Guide
- Solve problems involving volume Study Guide
- Understanding capacity and volume Study Guide
Browse all guides in the Year 3 Maths guide library.