Partitioning Numbers to 100 — Interactive Lesson (Year 2)

Can your pupils split 53 into tens and ones instantly? This 15-slide interactive lesson teaches partitioning numbers to 100, using part-whole models to make place value visible.

Mastering Partitioning Numbers to 100 in Year 2 Maths

Pupils use their understanding from previous units to partition numbers to 100, and count objects with a focus on bundling tens. They draw base 10 to complete part-whole models, complete sentences such as ‘5 tens and 3 ones is 53’, match numbers to their tens-and-ones representation, and work out numbers described in words, such as one with 8 tens and 9 ones. A final challenge asks pupils to write the number two children are thinking of based on given clues.

What’s Included

• 15-slide interactive lesson on partitioning numbers to 100
• Learning objectives on partitioning and bundling tens
• Base 10 and part-whole model representations
• Matching numbers to their tens-and-ones breakdown
• Word-clue number problems with instant feedback

Key Benefits for Students

• Builds a strong visual model for place value
• Practises partitioning in both directions
• Bundling tens links directly to counting strategies
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• A concise lesson that fits a single session
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A dependable foundation before column addition and subtraction

Love this? You’ll love…

• Adding and Subtracting 2-Digit Numbers with Exchange — Interactive Lesson (Year 2)
• Writing Numbers in Words and Figures — Interactive Lesson (Year 2)
• Number Bonds to 10 — Interactive Lesson (Year 2)

A dependable addition to a Year 2 place value topic, giving pupils a secure part-whole model for numbers to 100. This visual understanding of tens and ones is what makes later column methods make sense.

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FAQs

What year group is this for?
Year 2 (ages 6–7), KS1.

Does it use base 10 equipment?
Yes — base 10 and part-whole models are used throughout.

Is it self-marking?
Yes, with instant feedback on the questions.