[ARTIKEL] FAKTA ANGKA DALAM MATEMATIKA

FAKTA ANGKA DALAM MATEMATIKA

sumber: www.fadlihsan.blogspot.com

Fakta 1 :

1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987
1234 x 8 + 4 = 9876
12345 x 8 + 5 = 987 65
123456 x 8 + 6 = 987654
1234567 x 8 + 7 = 9876543
12345678 x 8 + 8 = 98765432
123456789 x 8 + 9 = 987654321

Fakta 2 :

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

Fakta 3 :

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

fakta 4 :

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

Fakta 5 :

123456789 X 9 X 1 = 1111111101
123456789 X 9 X 2 = 2222222202
123456789 X 9 X 3 = 3333333303

Fakta 6 :

1×9=9
2×9=18 -> 1+8=9
3×9=27 -> 2+7=9
4×9=36 -> 3+6=9
5×9=45 -> 4+5=9
6×9=54 -> 5+4=9
7×9=63 -> 6+3=9
8×9=72 -> 7+2=9
9×9=81 -> 8+1=9

Fakta 7 :

123456789 x 9 x 1 = 1111111101
123456789 x 9 x 2 = 2222222202
123456789 x 9 x 3 = 3333333303
123456789 x 9 x 4 = 4444444404
123456789 x 9 x 5 = 5555555505
123456789 x 9 x 6 = 6666666606
123456789 x 9 x 7 = 7777777707
123456789 x 9 x 8 = 8888888808
123456789 x 9 x 9 = 9999999908

Fakta 8 :

1 x 91 = 091
2 x 91 = 182
3 x 91 = 273
4 x 91 = 364
5 x 91 = 455
6 x 91 = 546
7 x 91 = 637
8 x 91 = 728
9 x 91 = 819

sumber : http://daunhijau.com/2013/04/fakta-unik-dan-menarik-seputar-matematika-1/