Year 2 - Maths
Partition two-digit numbers into tens and ones
Comparing, ordering and partitioning 2-digit numbers
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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 compare two 2-digit numbers and partition a 2-digit number into 10s and 1s and position on a number line.
Lesson Summary
You will learn to represent and interpret the structure of two-digit numbers on part-part-whole and bar models.
Key Notes
- Two-digit numbers can be partitioned into tens and ones.
- The order of the digits indicates their value.
Vocabulary To Learn
- Partition: To split a whole up into parts.
- Combine: To put parts together to make a whole.
- Part: A piece or section of a whole.
- Whole: All of something; complete.
Common Mistakes To Avoid
- Children may reverse the digits in a two-digit number, not understanding the value of each digit, or partition, for example, 54 into 5 and 4
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Two-digit numbers can be partitioned into tens and ones. The order of the digits indicates their value.
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 reverse the digits in a two-digit number, not understanding the value of each digit, or partition, for example, 54 into 5 and 4. Correction: Return to the use of practical equipment and ask children to prove they are right using it. They could also explain their ideas to a friend to encourage them to spot their own errors.
More Lessons In This Unit
Browse all guides in the Year 2 Maths guide library.