All the simple ones

1, 10 and 11

They are simple because 1*x = x, 10*x = x with a zero on the end, and 11*x is just xx!

1 x 1 = 1, 1 x 2 = 2, 1 x 3 = 3, 1 x 4 = 4, 1 x 5 = 5, 1 x 6 = 6, 1 x 7 = 7, 1 x 8 = 8, 1 x 9 = 9, 1 x 10 = 10, 1 x 11 = 11.

ehT terces tib

! X !@ + !@

ehT terces edoc