Targeted Year 1 resources for recap subtracting using number bonds, strengthening a key KS1 Maths mental arithmetic strategy. Activities utilise the CPA approach to reinforce the conceptual understanding that number pairs relate to subtraction facts, leading to computational mastery. This revision small step is essential for developing mental varied fluency and meeting national curriculum expectations for number fluency. The CS Maths Scheme supports efficient recall and application of these foundational facts.