Subtraction Using a Number Line
Practice jumping from the smaller number to the larger number on a number line. Lots of choice of level, including; jumping from a 2-digit number to 100, from a 2-digit number to a 3-digit number and between 3-digit numbers. Great for developing mental methods of calculation.
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KS2 Primary Framework:
Year 3:
Add or subtract mentally combinations of one–digit and two–digit numbers (Block A and D)
Develop and use written methods to record, support or explain addition and subtraction of two–digit and three–digit numbers (Block A and E)
Represent the information in a puzzle or problem using numbers, images or diagrams; use these to find a solution and present it in context (Block B)