Dedicated Year 5 resources for pupils to round to the nearest 100000 (up to 6-digits), applying rounding rules, a core KS2 Maths objective for approximation and estimation. Activities build conceptual understanding of the 'half-way point' (5 ten thousands) and promote reasoning in accurate rounding. This essential small step supports mastery of estimation and is vital for meeting national curriculum expectations. The CS Maths Scheme provides structured number line and calculation practice.