Year 3 - Maths
Solve problems using knowledge of addition and subtraction of multiples of 10
Securing place value to 100 and applying to addition and subtraction
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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 use known facts to find multiples of ten that compose 100 and use known facts to find complements to 100. They will add and subtract multiples of ten, bridging 100.
Lesson Summary
You will learn to solve problems by applying different strategies for adding and subtracting multiples of 10.
Key Notes
- Representations help to identify the calculation needed to solve a problem.
- Different strategies can be applied to solve different problems.
- Evaluating or discussing strategies helps to find the most efficient one.
Vocabulary To Learn
- Add: Bringing two or more numbers or things together to make a new total.
- Subtract: Taking one number from another.
- Strategy: A way to solve a problem.
- Part: A piece or section of a whole.
- Whole: All of a group or number.
Common Mistakes To Avoid
- Pupils not understanding what the problem is asking them to find out and identifying the operation.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Representations help to identify the calculation needed to solve a problem. Different strategies can be applied to solve different problems.
2. Use this key word in a maths sentence and explain it clearly. 'Add'
Bringing two or more numbers or things together to make a new total. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils not understanding what the problem is asking them to find out and identifying the operation. Correction: Model the use of bar models and manipulatives to represent the problem and how to identify the operation and calculations needed.
More Lessons In This Unit
- Bridge 100 by adding in multiples of 10 Study Guide
- Bridge 100 by subtracting in multiples of 10 Study Guide
- Composition of 100 in 10s and 1s Study Guide
- Composition of 100 in 50s, 25s and 20s Study Guide
- Multiples of 10 that total 100 Study Guide
- Represent 3-digit multiples of 10 in different ways Study Guide
- Use known facts to find complements to 100 efficiently Study Guide
- Use known facts to find pairs of numbers that total 100 Study Guide
- Use place value knowledge to write addition and subtraction equations Study Guide
Browse all guides in the Year 3 Maths guide library.