Targeted Year 4 resources for subtracting two 4-digit numbers with 1 exchange (regrouping), introducing the formal column subtraction method with thousands, a core KS2 Maths objective. Activities employ the CPA approach to build conceptual understanding of exchanging across place value columns, promoting reasoning. This essential small step supports mastery of formal subtraction and is vital for national curriculum calculation fluency. The CS Maths Scheme provides structured Base 10 and column format practice.
Full step description and curriculum objectives