This introduction covers Below Zero 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 1 of 14 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Below Zero
Think of a thermometer: 0°C is freezing point, but temperatures can go BELOW zero. -5°C is colder than -2°C (even though 5 is bigger than 2). Negative numbers are numbers less than zero, and they follow special rules when you calculate with them.
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
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.
Double Negative Rule
Subtracting a negative = Adding. Two minuses make a plus: 5 − (−3) = 5 + 3 = 8