https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-arithmetic-properties/v/inverse-property-of-addition

# Category: Math

## Island Conquer Area and Perimeter Game

https://www.lauracandler.com/wp-content/uploads/2018/06/IslandConquerAreaandPerimeterGame.pdf

## perimeter

https://www.math-salamanders.com/perimeter-worksheets.html