Addition and subtraction of two 2-digit numbers
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Threads
Why this why now
This unit builds on and applies knowledge of single digit facts and applies this to larger numbers. Pupils explain different addition and subtraction strategies and decide on the most efficient one for a given equation or problem. These strategies will be developed in future units to handle larger numbers.
Prior knowledge requirements
- Recall number bonds to 20
- Understand place value of tens and ones
- Use column or number line methods for addition and subtraction
Threads
Why this why now
This unit builds on and applies knowledge of single digit facts and applies this to larger numbers. Pupils explain different addition and subtraction strategies and decide on the most efficient one for a given equation or problem. These strategies will be developed in future units to handle larger numbers.
Prior knowledge requirements
- Recall number bonds to 20
- Understand place value of tens and ones
- Use column or number line methods for addition and subtraction
Addition and subtraction of two 2-digit numbers
In this unit pupils apply their knowledge of known facts and understanding of place value to add and subtract with 2-digit numbers both within and across the tens boundary.
15 lessons in unit
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