>>> Doing The Math >>> 13 times 7 = 28 https://www.youtube.com/watch?v=xkbQDEXJy2k http://www.youtube.com/watch?v=xkbQDEXJy2k http://www.youtube.com/watch?v=xkbQDEXJy2k http://www.youtube.com/watch?v=xkbQDEXJy2k https://www.youtube.com/watch?v=xkbQDEXJy2k http://www.youtube.com/watch?v=xkbQDEXJy2k Why students strugle with traditional algorithms.