Question

Qual o resultado de – 9 – 9 ?

Answer 1

$\huge\boxed{\boxed{\boxed{\sf - 18}}}$

Basta conservarmos o sinal negativo e somarmos os valores 9.

$\boxed{ \begin{array}{lr}\sf - (9 + 9) \\ \\\boxed{\boxed{\boxed{\sf - 18}}} \end{array}}$

Att: Nerd1990