Deepen children's understanding of subtraction with our Year 4 Subtract Two 4-Digit Numbers - More than One Exchange Discussion Problem. This resource presents children with two subtraction problem-solving question designed to challenge their understanding, inspire curiosity, and prompt mathematical discussions about subtracting two 4-digit numbers with more than one exchange.

While both tasks were created to inspire group discussion, they can also work happily as a solo task for children with a secure knowledge of subtraction. Alternatively, you could display the tasks on screen and open the discussion up to the whole class too. For each question, a model answer is provided for children to compare their outcomes to. This is a great chance to address misconceptions too.