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number line worksheets addition subtraction

Use the worked example and teaching sequence below to explain the reasoning before independent practice.

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Teaching Notes

Use the worked example and teaching sequence below to explain the reasoning before independent practice.

Before You Begin

Teaching Steps for Parents and Teachers

  1. Find the starting value on the number line.
  2. For addition, count forward; for subtraction, count backward.
  3. Count moves rather than including the starting mark.

Worked Examples

Use a number line for 5 + 3 and 8 − 3.

  1. From 5, move forward three steps: 6, 7, 8.
  2. From 8, move backward three steps: 7, 6, 5.

Answer: 5 + 3 = 8; 8 − 3 = 5

Common Mistakes and How to Help

Count spaces between marks, not the marks themselves.

Does the same step size work between every pair of adjacent marks?

Questions to Check Understanding

Practice Advice

Work through the example together. Ask the learner to explain the first two problems, then try three independently. Review the first incorrect step before assigning more practice.

Next Practice