12, 123, 1234

123-12=111

$\begin{matrix} 1 & 2 & 3 \\ - & 1 & 2 \end{matrix}\\ \overline { \begin{matrix} 1 & 1 & 1 \end{matrix} }$

123-12 = 111

This is very easy. 123-12 =111 Others like 1234-123 will get 1111 And so on

123-12=123-(10+2)

123-10=113-2=111

Não seria 12-123=-111 Não é negativo?

123-12=111

Subtract 12 from 123=111

123-12=111

123-12 is 111

123-12=111

123-12=111

123-12=111

12 less than 123 would be 123-12 and the answer would be 111.

Subtract 12 from 123

123 - 12 = 111

123-12=111 ->

123 - 10 - 2 ->

113 - 2 = 111