Build children’s number sense with this Year 1 Estimate on a Number Line to 20 Reasoning and Problem Solving worksheet. This resource supports children in developing a secure understanding of how to make sensible estimates on a number line to 20, strengthening their skills in positioning and comparing numbers. Pupils will be encouraged to justify their estimates, spot and correct errors and explore different strategies to improve their accuracy. Perfect for independent tasks, small group work or paired discussions, this resource also includes a modelled answer sheet to support self and peer assessment. Download now!