Support children’s number sense with this Year 1 Understand 11, 12 and 13 Reasoning and Problem Solving worksheet. This resource encourages children to apply their understanding of counting, place value and number composition for 11, 12 and 13, helping to build confidence when working with teen numbers. Pupils will be challenged to explain their thinking, spot mistakes and represent numbers in different ways. Perfect for independent tasks, small group activities or paired discussions, this resource includes a modelled answer sheet to support self and peer-marking. Download now!