Year 4 - Maths
Explain how many '500s' and '250s', 1,000 is composed of
Column addition and subtraction with 4-digit numbers
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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 consolidate column addition with regrouping and column subtraction with exchanging to solve problems. They will use known facts and strategies to accurately and efficiently calculate and check.
Lesson Summary
You will learn to explain how many 500s and 250s 1,000 is composed of.
Key Notes
- There are two 500s in 1,000
- There are four 250s in 1,000
- Knowing how many 500s and 250s 1,000 is composed of helps to interpret scales and measures.
Vocabulary To Learn
- Compose: The composition of the whole is the way in which it is made.
- Multiples: The result of multiplying a number by another whole number.
- Division: Equal divisions refer to equal spacing on a number line or scale.
Common Mistakes To Avoid
- Pupils unable to connect scale divisions with knowledge of composition of 1,000
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
There are two 500s in 1,000. There are four 250s in 1,000.
2. Use this key word in a maths sentence and explain it clearly. 'Compose'
The composition of the whole is the way in which it is made. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils unable to connect scale divisions with knowledge of composition of 1,000. Correction: Spend time developing confidence in counting in multiples of 500 and 250 to 1,000 before making explicit links between this and scales and measures. Use 'The whole is 1,000 and we have divided it into ___ parts of ___' when doing this.
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