Keajaiban Matematik

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 = 1111
23 x 9 + 4 = 11111
234 x 9 + 5 = 111111
2345 x 9 + 6 = 1111111
23456 x 9 + 7 = 11111111
234567 x 9 + 8 = 111111111
2345678 x 9 + 9 = 1111111111
23456789 x 9 +10= 1111111111