Question

−4 + {5 − [3 − (−7 + 9)]}

Answer 1

Resposta:

Bora lá

Primeiramente os parênteses

-4 + {5 − [3 − (−7 + 9)]}

-4 + {5 − [3 − (2)]}

-4 + {5 − [3 − 2]}

-4 + {5 − [1]}

-4 + {5 − 1}

-4 + 4 = 0

Answer 2

-4+{5-[3(+7-9)]}

-4+{5-[3+7-9]}

-4+{5-3-7+9}

-4+5-3+7+9

+21-7

14