Yes it's true!
How can this be?
let's take a look!
ok, first, look at this problem...
13 x 7 
now, multiply the three 7 times and place the result like this...
13 x 7  21
next, multiply the one 7 times and place the result like this...
13 x 7  21 7
add the 21 and 7...
13 x 7  21 + 7  28
and you get 28. therefore, 13x7=28.
WHAT? You want me to prove it by division? Well, here goes...
 7)28
now let's start with the 2.
 7)28
now, how many times does seven go into 2?
zero. you cannot divide 7 into 2.
so, you go to the 8.
 7)28
now, how many times does seven go into 8?
one. so, place the 1 like this...
1  7) 28
put the 7 under the 28 like this...
1  7) 28 7
and subtract the 7 from the 28...
1  7) 28  7  21
next, how many times does 7 go into 21?
3. so you put the 3 to the right of the 1, put the product of 3x7 under the 21, and...
13  7) 28  7  21  21  0
you have no remainder, so the answer is an integer.
therefore, 7 into 28 is 13.
WHAT? You want me to prove it by addition? well, consider this...
13 + 13 + 13 + 13 + 13 + 13 + 13 
now, add the 3's together: 3. 6. 9. 12. 15. 18. 21.
13 + 13 + 13 + 13 + 13 + 13 + 13  21
... add the 1's: 22. 23. 24. 25. 26. 27. 28.
13 + 13 + 13 + 13 + 13 + 13 + 13  21 + 7  28
there! that proves that...
d.t.

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