Question

calcule valor da expresao 12-{5-3+[8-(-3-1)-(-5)]}

Answer 1

$12-\{5-3+[8-(-3-1)-(-5)]\}=\\12-\{5-3+[8-(-4)+5]\}=\\12-\{5-3+[8+4+5]\}=\\12-\{5-3+17\}=\\12-19=-7$

Answer 2

Vamos lá

12 - {5 - 3 + [8 - (- 3 - 1) - (- 5)]}

12 - {5 - 3 +[8 - (- 4) + 5]}

12 - {5 - 3 + [8 + 4 + 5]}

12 - {2 + 17

12 - 19

- 7

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