Keajaiban Matematika

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


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
111111111 x 111111111 = 12345678987654321

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


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

semua angka kalo dikalikan 9, hasilnya kalo dijumlahin sampe tinggal satu angka, hasil akhirnya = 9
bisa dicoba kok