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The beauty of math


Forum: Homeschooling

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  #1  
July 12th, 2006, 01:26 PM
mrobinson
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Posts: n/a
Beauty of Math's!
1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987
1234 x 8 + 4 = 9876
12345 x 8 + 5 = 98765
123456 x 8 + 6 = 987654
1234567 x 8 + 7 = 9876543
12345678 x 8 + 8 = 98765432
123456789 x 8 + 9 = 987654321

1 x 9 + 2 = 11
12 x 9 + 3 = 111
123 x 9 + 4 = 1111
1234 x 9 + 5 = 11111
12345 x 9 + 6 = 111111
123456 x 9 + 7 = 1111111
1234567 x 9 + 8 = 11111111
12345678 x 9 + 9 = 111111111
123456789 x 9 +10= 1111111111

9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888

Brilliant, isn't it?
And finally, take a look at this symmetry:

1 x 1 = 1
11 x 11 = 121
111 x 111 =12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111=12345678987654321

~~~~~~~~~~~~~~~~~~~~~~~~~~

I hope you like this.
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  #2  
July 12th, 2006, 02:40 PM
KarateMom's Avatar Mega Super Mommy
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WOW! I don't like math, but that was pretty cool!
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  #3  
July 13th, 2006, 05:04 PM
Mega Super Mommy
Join Date: Mar 2005
Posts: 3,160
I love 9's.
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  #4  
July 16th, 2006, 12:43 PM
MissyPrincessEha's Avatar Platinum Supermommy
Join Date: Feb 2005
Location: Louisiana
Posts: 11,318
Yea, I am not a math gal...but that was pretty neat!
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