Arithmetic Curiosities

1 x 9 + 2 = 11 9 x 9 + 7 = 88 9 x 9 = 81 6 x 7 = 42
12 x 9 + 3 = 111 98 x 9 + 6 = 888 99 x 99 = 9801 66 x 67 = 4422
123 x 9 + 4 = 1111 987 x 9 + 5 = 8888 999 x 999 = 998001 666 x 667 = 444222
1234 x 9 + 3 = 11111 9876 x 9 + 4 = 88888 9999 x 9999 = 99980001 6666 x 6667 = 44442222