Question

4) Resolva as seguintes expressões numéricas:
1) 15- (8-7) + (9 - 4) =
II) 12 - {-3+ [1 + (+2 - 9) -- 8}+5) =​

Answer 1

Resposta:

$15 - (8 - 7) + (9 - 4) \\ 15 - 1 + (9 - 4) \\ 15 - 1 + 5 = 19$

$12 - ( - 3 + (1 + ( + 2 - 9) - 8) + 5) \\ 12 - ( - 3 + (1 + ( - 7) - 8) + 5) \\ 12 - ( - 3 + (1 - 7 - 8) + 5) \\ 12 - ( - 3 + ( - 14) + 5) \\ 12 - ( - 3 - 14 + 5) \\ 12 - ( - 12) \\ 12 + 12 = 24$