1
Adding a negative = Subtracting: 5 + (−3) = 5 − 3 = 2
2
Subtracting a negative = Adding: 5 − (−3) = 5 + 3 = 8
3
Memory trick: Two minuses next to each other (− −) become a plus!
4
Number line method: Move right for positive, left for negative
This deep dive covers Adding and Subtracting with Negatives within Negative Numbers for GCSE Mathematics. Revise Negative Numbers in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 4 of 14 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Negative Numbers
Which of these statements is true?
Aisha's bank account shows a balance of -45 pounds. She deposits 70 pounds. Explain what her new balance is and what the negative sign meant originally.
Quick recall flashcards
Double Negative Rule
Subtracting a negative = Adding. Two minuses make a plus: 5 − (−3) = 5 + 3 = 8
Using a number line
Draw a horizontal line with 0 in the middle. Negative numbers go LEFT, positive RIGHT. Moving right = adding, moving left = subtracting.