Question

Me pueden ayudar a suprimir los signos dd agrupacion y resolver ☺

Answer 1

-10+20-[-8-(9+6-13)]
-10+20-[-8-(2)]
-10+20-[-8-2]
-10+20-[-10]
-10+20+10= 20

15+{3-[-11-(13+14)-7]}
15+{3-[-11-(27)-7]}
15+{3-[-11-27-7]}
15+{3-[-45]}
15+{3+45}
15+3+45= 63

-120-[-32+(-14-18-7)]
-120-[-32+(-39)]
-120-[-32-39]
-120-[-71]
-120+71= -49

300-[70+(-4-20-10)]
300-[70+(-34)]
300-[70-34]
300-[36]
300-36= 264

12+{4-[-15-(1+2)-10]}
12+{4-[-15-(3)-10]}
12+{4-[-15-3-10]}
12-{4-[-28]}
12-{4+28}
12-{32}
12-32= -20