https://www.khanacademy.org/kmap/numbers-operations-the-real-complex-number-systems-224-228lp/xed7c1c0d47c6de2a:numbers-operations-the-real-complex-number-systems8 2026-06-26T15:40:50.739424638Z Numbers & Operations - The Real & Complex Number Systems 224-228 Add and subtract negative numbers, and see how absolute value can be used to find the distance between any two numbers on the number line. unit