Subtract fractions with the same denominator using number lines: Example question
31 October 2026
When children learn to subtract fractions with the same denominator, number lines make the process clear and visual. This method helps your child see how each jump on the line represents a part of the whole, making subtraction more concrete.
Worked example
Question: What is 5/8 - 2/8? Use a number line to help you.
Step 1: Draw a number line from 0 to 1. Mark the fractions in eighths: 0/8, 1/8, 2/8, 3/8, 4/8, 5/8, 6/8, 7/8, 8/8.
Step 2: Start at 5/8 on the number line.
Step 3: Move 2 jumps left. Each jump is 1/8.
Step 4: After 1 jump left, you are at 4/8. After 2 jumps left, you are at 3/8.
Key insight: Subtracting fractions with the same denominator means moving left by the top number (the numerator).
The correct answer is 3/8.
Click or tap on the number line to answer
After working through this example, your child will be able to spot how subtracting fractions with the same denominator is just like counting jumps to the left on a number line. They can now try similar questions to build confidence using this approach.
