Get ready for addition and subtraction | Khan Academy
https://www.khanacademy.org/math/get-ready-for-3rd-grade/x3c950fa744f5f34c:get-ready-for-addition-and-subtraction
WEBLet's build a solid foundation of place value, adding, and subtracting smaller numbers so that we'll be ready for adding and subtracting larger numbers in third grade. This unit will expand your addition and subtraction skills by working with numbers up to 1000 and using various visual tools to help you solve.
DA: 46 PA: 79 MOZ Rank: 81 Up or Down: Up