Year 1 - Maths
Solve problems by comparing sets of objects
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 solve problems by comparing the number of objects in two sets.
Key Notes
- Make comparisons between 2 sets of the same objects.
- Make comparisons between 2 sets of different objects.
- Count the different objects separately.
- One set can contain more or fewer objects than the other.
- Both sets can contain the same number of objects.
Vocabulary To Learn
- same: two or more things are identical
- different: non-identical
- more than / greater than: has a greater amount / more items.
- less than / fewer than: has a lesser amount / fewer items.
- equal to: exactly the same amount or value
Common Mistakes To Avoid
- Children may think that bigger objects, or objects that are spread out have a greater value.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Make comparisons between 2 sets of the same objects. Make comparisons between 2 sets of different objects.
2. Use this key word in a maths sentence and explain it clearly. 'same'
two or more things are identical. 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 think that bigger objects, or objects that are spread out have a greater value. Correction: Emphasise that we are counting the number of objects and it does not matter about the size or position.
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 that items can be compared using weight and mass 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 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
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