Adding and subtracting ones and tens to and from 2-digit numbers
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Why this why now
This unit applies the number fact and place value work of the previous units to working with numbers beyond 20. Pupils use familiar representations: part-part-whole models and number lines, to support partitioning and bridging through tens.
Prior knowledge requirements
- Count to 100
- Understand place value of tens and ones
- Partition numbers in different ways
Threads
Why this why now
This unit applies the number fact and place value work of the previous units to working with numbers beyond 20. Pupils use familiar representations: part-part-whole models and number lines, to support partitioning and bridging through tens.
Prior knowledge requirements
- Count to 100
- Understand place value of tens and ones
- Partition numbers in different ways
Adding and subtracting ones and tens to and from 2-digit numbers
In this unit pupils will add and subtract 1s and 10s from 2 digit numbers. They will use number facts to add/subtract a single-digit number to/from a 2-digit number. They will use a part-part-whole model to represent addition and subtraction.
15 lessons in unit
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