Year 1 - Maths
Solve problems using 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 solve problems using a bar model to partition a number into two parts.
Key Notes
- Partitioning of numbers to five can be represented using the bar model.
- The bar model and the part-part-whole diagram can be used to represent stories.
- Systematic thinking can be used to ensure all possible responses to a problem can be found.
Vocabulary To Learn
- Partition: Partition is to split a whole up into parts.
- Combine: Combine means 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 whole and the parts.
Common Mistakes To Avoid
- As before, children may confuse the whole and the parts, or add them all up to find the total.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Partitioning of numbers to five can be represented using the bar model. The bar model and the part-part-whole diagram can be used to represent stories.
2. Use this key word in a maths sentence and explain it clearly. 'Partition'
Partition is 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: As before, children may confuse the whole and the parts, or add them all up to find the total. Correction: Place objects in each part of the bar model and combine them to make the whole, or starting within the whole, partition them into the parts.
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
- Use a bar model to represent a whole partitioned into two parts Study Guide
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