https://es-cl.khanacademy.org/math/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract 2025-11-20T17:53:56.044440592Z Integers: addition and subtraction Let's extend our addition and subtraction understanding to include negative numbers. Whether we need temperatures below zero, altitudes below sea level, or decreases from any other reference point, negative numbers give us a way to represent it. unit