GCSE Maths (Edexcel)

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Adding or Subtracting a Negative Number

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Number Structure and Calculation

Adding or Subtracting a Negative Number

4:07 Working with Negative Numbers
Spec N2
Previous Long Division Next Adding to a Negative Number
  • When adding negative numbers, a positive sign next to a negative sign makes a negative sign.
  • When subtracting negative numbers, two negative signs next to each other make a positive sign.
  • The first step when adding numbers together is to rewrite by changing the two signs next to each other into a single sign.
  • Drawing a number line can be helpful for these kinds of calculations.
  • When subtracting, move to the left on the number line.
  • When adding, move to the right on the number line.
  • Perform the operation by moving on the number line.
  • 5 plus negative 6 is equal to -1.
  • 3 minus negative 5 is equal to 8.

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