Year 1 - Maths
Using bar models to subtract
Additive structures: addition
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Study Guides
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 combine 2 or more parts to make a whole. They will learn addends can be represented in any order and that the = sign shows the whole and sum of the parts are equal.
Lesson Summary
You will learn to use bar models to represent and solve subtraction problems.
Key Notes
- A bar model can be used to represent subtraction problems and equations.
- Overlaying manipulatives on a bar model can be useful for helping to solve subtraction problems and equations.
Vocabulary To Learn
- Subtract: To separate or take away one number from another, or to decrease an amount.
- Known part: A piece or section of the whole that is known.
- Unknown part: A piece or section of the whole that is not known.
Common Mistakes To Avoid
- Children may muddle the order of the numbers on a bar model and in a subtraction equation.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
A bar model can be used to represent subtraction problems and equations. Overlaying manipulatives on a bar model can be useful for helping to solve subtraction problems and equations.
2. Use this key word in a maths sentence and explain it clearly. 'Subtract'
To separate or take away one number from another, or to decrease an amount. 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 muddle the order of the numbers on a bar model and in a subtraction equation. Correction: If children are not secure, then return to the concrete to secure understanding of this structure of subtraction.
More Lessons In This Unit
- Add parts to find the value of the whole and write the equation Study Guide
- Combine parts using the addition symbol Study Guide
- Find the missing part in an equation Study Guide
- Partition a whole into two parts and write as a subtraction equation Study Guide
- Understand addition as increasing a quantity Study Guide
- Understand that parts can be represented in any order Study Guide
- Understand the relationship between addition and subtraction Study Guide
- Understand the use of the equals sign in equations Study Guide
- Understanding part-part-whole relationships Study Guide
Browse all guides in the Year 1 Maths guide library.