Once children become more secure when subtracting and exchanging from one place value column using the column method, why not extend their learning with some reasoning and problem-solving activities?
This Year 4 Subtract Two 4-Digit Numbers (1 Exchange) worksheet uses six questions to gradually consolidate and build their understanding. They will have to find missing digits, create their own column subtractions using one exchange and investigate a completed column subtraction for errors.
All answers are provided too!