Year 1 - Maths
Explain that items can be compared using weight and mass
Comparing quantities - part part whole relationships
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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 that items can be compared using length and height, mass and volume/capacity. They will compare sets of objects using equality/inequality symbols. Pupils will also explore part-part-whole relationships with representations.
Lesson Summary
You will learn to compare items according to their mass.
Key Notes
- Know the language used when comparing mass, the ___ is heavier / lighter than the ___.
- Know when comparing items that are equal to each other in mass, we use the language of 'the same' or 'is equal to'.
Vocabulary To Learn
- heavier than: an object has more weight than another
- lighter than: an object has less weight than another
- the same: exactly the same amount or value
- equal to: exactly the same amount or value
Common Mistakes To Avoid
- May find it hard to feel whether an object is heavier, lighter or equal to the mass of another.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Know the language used when comparing mass, the ___ is heavier / lighter than the ___. Know when comparing items that are equal to each other in mass, we use the language of 'the same' or 'is equal to'.
2. Use this key word in a maths sentence and explain it clearly. 'heavier than'
an object has more weight than another. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: May find it hard to feel whether an object is heavier, lighter or equal to the mass of another. Correction: Model using yourself as a scale in different ways - using both hands, picking one object up after another, then having one in each hand.
More Lessons In This Unit
- Count a set of objects Study Guide
- Explain that a whole can be split into parts Study Guide
- Explain that a whole can represent a group of objects Study Guide
- Explain that items can be compared using capacity Study Guide
- Explain that items can be compared using length and height Study Guide
- Explain what a part-part-whole model is Study Guide
- Explain what a whole is Study Guide
- Identify a part of a whole group Study Guide
- Solve problems by comparing sets of objects Study Guide
- Solve problems using part-part-whole models with more than two parts Study Guide
- Use a part-part-whole model to represent a whole partitioned into two parts Study Guide
- Use a part-part-whole model to represent partitioning into more than two parts Study Guide
- Use equality and inequality symbols to compare sets of objects Study Guide
- Use equality and inequality symbols to compare the relative size of two numbers Study Guide
Browse all guides in the Year 1 Maths guide library.