This Year 1 The Number Line to 50 Reasoning and Problem Solving worksheet helps children to apply their new understanding of how the numbers 20 to 50 are represented on a number line. Children will fill in missing numbers on a number line and explain how they worked it out for the reasoning question. For the problem-solving question, pupils are asked to find three missing numbers on a number line by following clues. An answer page is also provided to encourage self or peer marking. Give it a try today!