Added: 5 years ago
From: khanacademy
Views: 151,189
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  • this is so confusing. i thought 11 + 4 was 9

  • @best496

    Me too. My head hurts. 

  • When avocados Didnt do it anymore, they moved to sour fruits....

  • I like this videos very much. I love the way Khana knows how to make it simple.

  • heh_Î_fêÈl_sô_loNElý_t0DÀy

  • My friend is trying to help me retain numbers when they're in a list, not knowing it's a hopeless effort. The part of my brain that deals w/ numbers in a list, either up and down or side to side, is damaged.

    I ALWAYS have to cover the other numbers or I can't add or subtract them.

    I CAN'T do them in my head.

  • where was you when i was in school ..great teaching

  • Sal, I loved the Sesame Street homage.

  • Dude you are the best teacher ever, whole much better than my ridiculous teacher at my school.

  • i like how you say 15

  • Comment removed

  • thanks...i plan to use your videos to help my children with basic math as a suppliment.... thanks

  • why do you carry over numbers when you add?

  • This made my brother smartt

  • "It's better to take a long time than to get it wrong"

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