Transcript (en)

You owe me back room rent. You owe me 13 weeks at $7 a week. All right, here's the $28. Just a minute. You owe me 13 weeks at $7 a week, and that happens to be a lot more than $28. Well, that comes to $28. You can prove it very easily by multiplication. 7 times 13 is true. Go ahead. Now, first, we've got to put down a 13, right? Right. There's a 13. Times 7. Times 7. Right. 7 weeks times 13, right? 7 times 3. 21. 21. 7 times 1. 7. 7. 7 and 1. 8. And 2 to carry. 28. Give it to me. Wait a minute. Wait a minute. I'm still not convinced. There's one sure way of proving this. You want me to addition it up? I want you to put 13, 7 times on that wall and then draw a line and add them up. There's 1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. Just a minute. I will do the adding. then there'll be no mistake. 3, 6, 9, 12, 15, 18, 21. 22, 23, 24, 25, 26, 27, 28.