Column subtraction
Downloads can take a few minutes, especially for larger files or slower connections.
Threads
Why this why now
This unit returns to additive thinking and introduces pupils to representing subtraction in columns, applying both their understanding of place value and of subtraction. They identify wholes and parts and label them with the language of minuend and subtrahend. Pupils link the notation of regrouping in column subtraction with representations using base ten resources. They also make decisions about which strategy is more efficient: mental method or column subtraction.
Prior knowledge requirements
- Understand place value and alignment of digits
- Use mental subtraction strategies
- Apply column method to 2- and 3-digit numbers
Threads
Why this why now
This unit returns to additive thinking and introduces pupils to representing subtraction in columns, applying both their understanding of place value and of subtraction. They identify wholes and parts and label them with the language of minuend and subtrahend. Pupils link the notation of regrouping in column subtraction with representations using base ten resources. They also make decisions about which strategy is more efficient: mental method or column subtraction.
Prior knowledge requirements
- Understand place value and alignment of digits
- Use mental subtraction strategies
- Apply column method to 2- and 3-digit numbers
Column subtraction
In this unit pupils will identify the minuend and the subtrahend in column subtraction and explain the column subtraction algorithm. They will subtract from a 2-digit number using column subtraction with exchanging.
5 lessons in unit
slide decks, worksheet PDFs, quizzes and lesson overviews. You can select individual lessons from the Column subtraction unit and download the resources you need, or download the entire unit now. See every unit listed in our primary maths curriculum and discover more of our teaching resources for primary maths programmes.