Subtracting different ways (video) | Khan Academy
https://www.khanacademy.org/math/arithmetic-home/addition-subtraction/add-subtract-20/v/subtraction-2
WebTaking a teen number and then subtracting any of the one-digit numbers from those teen numbers. That's in general, very, very good practice for you. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free ...
DA: 48 PA: 52 MOZ Rank: 7