30 outubro 2008

Curiosidades matemáticas


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


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
1111111111 x 1111111111 = 12345678987654321


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