Essential Year 1 resources for finding one less than a given number up to 10, a foundational KS1 Maths concept directly linked to subtraction and number order. Activities employ the CPA approach to build conceptual understanding of the inverse operation and develop varied fluency in mental calculation. This key small step is crucial for achieving national curriculum mastery in number sequence and early subtraction. The CS Maths Scheme provides structured visual and practical tasks.
Full step description and curriculum objectives