Question

Valor da expressao -4+(5-6)+5-{3-(2-3)+4}+8-9

Answer 1

-4+(5-6)+5-{3-(2-3)+4}+8-9 =
-4+(-1)+5-{3-(-1)+4}+8-9 =
-4-1+5-{3+1+4}-1 =
-5+5-{8}-1 =
0 - 8 - 1 =
-9