Thats really cool. Have you ever heard of this math joke.
A boy who is in elementry school is taking a test on his multiplacation facts, but he forgot to study. This is what his paper looked like....He starts out saying, " o, ofcourse I know what 9x1 is, its 9. So then he writes it.
1.) 1x9= 9
2.) 2x9=
3.) 3x9=
4.) 4x9=
5.) 5x9=
6.) 6x9=
7.) 7x9=
8.) 8x9=
9.) 9x9=
But then he says, "hmmmm...I don't know what the rest are so I am going count all of the problems that I don't know.
1.) 1x9= 9
2.) 2x9= 1
3.) 3x9= 2
4.) 4x9= 3
5.) 5x9= 4
6.) 6x9= 5
7.) 7x9= 6
8.) 8x9= 7
9.) 9x9= 8
Then, the boy says, "O, Wait! I think I counted that wrong. Let me count that again. This time he starts counting from the bottom up.
1.) 1x9= 9
2.) 2x9= 18
3.) 3x9= 27
4.) 4x9= 36
5.) 5x9= 45
6.) 6x9= 54
7.) 7x9= 63
8.) 8x9= 72
9.) 9x9= 81
The boy starting to get frustrated says to himself, "O, well, I guess that I will just turn in my paper and hope that I do ok. I hope that my mom won't get too mad at me for not studing".