Year 1 - Maths
Use a bar model to represent a whole partitioned into two parts
Composition of numbers 0 to 5
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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 revisit how numbers are represented cardinally and ordinally. They will partition 1 - 5 in different ways, find a missing part when one part and the whole are known and explore one more and one less with numbers to five.
Lesson Summary
You will learn to use a bar model to represent the different ways of partitioning a number into two parts.
Key Notes
- Partitioning can be represented using the bar model.
- There are ___ objects. ___ is the whole.
- There are ___ and ___. ___ is a part. ___ is a part.
- Combine the bars to form the full bar model, and compare this with the part-part-whole model.
Vocabulary To Learn
- Partition: To split a whole up into parts.
- Combine: To put parts together to make a whole.
- Bar model: A bar model is a pictorial representation of a problem where bars are used to represent the known and unknown quantities.
Common Mistakes To Avoid
- Children may not see the bar model as proportional, so may think that the parts are equal.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Partitioning can be represented using the bar model. There are ___ objects. ___ is the whole.
2. Use this key word in a maths sentence and explain it clearly. 'Partition'
To split a whole up into parts. 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 not see the bar model as proportional, so may think that the parts are equal. Correction: Encourage children to see that the bars are proportional to help them get a sense of the size of the parts and whole.
More Lessons In This Unit
- Explain that numbers can represent how many objects there are in a set Study Guide
- Find a missing part when one part and the whole is known Study Guide
- Ordinal numbers show the position of an object in relation to another Study Guide
- Partition numbers one to five in different ways Study Guide
- Partition the numbers one to five in a systematic way Study Guide
- Show one more and one less than a number using representations Study Guide
- Show one more and one less than a number using representations and describe this accurately Study Guide
- Solve problems finding a missing part when one part and the whole is known Study Guide
- Solve problems using a bar model to represent a whole partitioned into two parts Study Guide
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