Year 2 - Maths
Add two numbers that bridge through 10
Calculating within 20
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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 add 3 addends. They will use a strategy such as finding 2 addends to total 10 or 2 numbers to bridge though 10.
Lesson Summary
You will learn to add two numbers that bridge through 10.
Key Notes
- Partition one of the addends to make a pair that total 10 with the other addend.
- Use known facts to partition an addend.
Vocabulary To Learn
- Partition: The act of splitting an object or value down into smaller parts.
- Number pair: In this instance, two numbers that sum to make 10
Common Mistakes To Avoid
- Children use ten frames but use them to 'count all' or 'count on' without making 10
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Partition one of the addends to make a pair that total 10 with the other addend. Use known facts to partition an addend.
2. Use this key word in a maths sentence and explain it clearly. 'Partition'
The act of splitting an object or value down into smaller 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 use ten frames but use them to 'count all' or 'count on' without making 10. Correction: Ten frames can provide a great scaffold for all in this lesson when used to 'make 10'. Stress that we partition an addend to make 10 and that once the ten frame is full, it shows one ten so we do not need to count them all.
More Lessons In This Unit
- Add and subtract two numbers that bridge through 10 Study Guide
- Add three addends Study Guide
- Add three addends efficiently Study Guide
- Add three addends efficiently by finding two addends that total 10 Study Guide
- Calculate the difference Study Guide
- Calculate the difference in different contexts Study Guide
- Calculate the difference when information is presented in a bar chart Study Guide
- Calculate the difference when information is presented in a pictogram Study Guide
- Compare the number of objects in two sets or difference between two measures. Study Guide
- Explain that the addends can be added in any order Study Guide
- Explain what the difference is between consecutive numbers Study Guide
- Use a 'First, then, then, now' story to add three addends Study Guide
- Use knowledge of calculating within 20 to solve problems Study Guide
- Use knowledge of calculating within 20 to solve problems involving statistics Study Guide
Browse all guides in the Year 2 Maths guide library.