Challenging Year 4 resources for two-step addition and subtraction problems (word problems) with 4-digit numbers, requiring sequential calculations, a key KS2 Maths objective for complex application. Activities promote problem-solving and deepening understanding by requiring pupils to complete two arithmetic steps to solve the contextual problem. This crucial small step supports mastery of mathematical application and is vital for national curriculum expectations. The CS Maths Scheme provides varied, multi-step word problems.