Year 1 - Maths
Identify a missing part when a whole is partitioned into two parts
Composition of numbers 6 to 10
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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 represent numbers 6 - 10 by partitioning in different ways. They will learn what odd and even numbers are and how they can be partitioned. They will identify a missing part when a whole is partitioned into two parts where one of the parts is known.
Lesson Summary
You will learn to identify a missing part when a whole is partitioned into two parts.
Key Notes
- Numbers can represent measures when a part is missing.
- Each of the numbers six to ten can be partitioned into two parts in different ways.
- If we know one part we can find the other part.
- A bar model can be used to represent the whole number and a missing part.
- Knowing about odd and even parts means you know if the missing part is odd or even.
Vocabulary To Learn
- Partition: To split a whole up into parts.
- Whole: All of something. Complete.
- Part: A piece or section of a whole.
Common Mistakes To Avoid
- Children may confuse the part and the whole, or add the whole and one part to find the missing part.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Numbers can represent measures when a part is missing. Each of the numbers six to ten can be partitioned into two parts in different ways.
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 confuse the part and the whole, or add the whole and one part to find the missing part. Correction: Encourage the use of the stem sentence ___ is the whole, ___ is a part and ___ is a part, to reinforce what the numbers represent.
More Lessons In This Unit
- Compare two numbers and say which is greater than or less than the other Study Guide
- Count a set of objects and match the spoken number to the written numeral and number name Study Guide
- Estimate where 6, 7, 8 and 9 lie on an unmarked number line Study Guide
- Explain how even and odd numbers can be partitioned Study Guide
- Explain what odd and even numbers are and the difference between them Study Guide
- Explain where 6, 7, 8 and 9 lie on a number line Study Guide
- Explore the numbers 6 to 10 using the parts and wholes on a number line Study Guide
- Identify the whole and parts of the numbers 6 to 10 using the five and a bit structure Study Guide
- Order and sort numbers into odd and even sets Study Guide
- Partition the numbers 6 and 7 in different ways Study Guide
- Partition the numbers 6 to 10 in different ways Study Guide
- Partition the numbers 8 and 9 in different ways Study Guide
- Represent the numbers 6 to 10 using a five and a bit structure Study Guide
- Skip count in odds and evens Study Guide
Browse all guides in the Year 1 Maths guide library.