https://www.khanacademy.org/math/mh-math-class-3-new/xa7b65308c92e651a:untitled-175/xa7b65308c92e651a:correlation-between-addition-and-subtraction/e/correlation-between-addition-and-subtraction 2026-07-03T09:10:53.183713424Z Correlation between Addition and Subtraction In this exercise students solidify their understanding that subtraction is the direct reverse operation of addition. Khan Academy exercise