Question

b,-15+{[32+(-8×6)-24]+5×3]-27}
c, 32+{-[15+(7+5×3-4÷2)-18]+17
d,-61+{18-[25×3•(5×4-2÷2+11)+17]}
E,42-{-24-[32×(8-5)+15÷3+4]-16}
me ajudem

Answer 1

Boa tarde.

B) -15+{[32+(-8×6)-24+5×3]-27} = -161
C) 32+{-[15+(7+5×3-4÷2)-18]+17 = 32
D) -61+{18-[25×3•(5×4-2÷2+11)+17]} = -2384
E) 42-{-24-[32×(8-5)+15÷3+4]-16} =  187

B) -15+{[32+(-8×6)-24+5×3]-27} = 
-15+{[32+(-48)-24+15]-27} = 
-15+{[32-48-24+15]-27} = 
-15+{[47-72]-27} = 
-15+{-47-72-27} = 
-15+{-146} = 
-15-146 = -161

C) 32+{-[15+(7+5×3-4÷2)-18]+17} = 
32+{-[15+(7+5.3-2)-18]+17} = 
32+{-[15+(7+15-2)-18]+17} = 
32+{-[15+22-2-18]+17} = 
32+{-[37-20]+17} = 
32+{-[17]+17} = 
32+{-17+17} =
32+0 = 32

-61+{18-[25×3•(5×4-2÷2+11)+17]} =
-61+{18-[75.(20-1+11)+17]} = 
-61+{18-[75.31-1+17]} = 
-61+{18-[2325-1+17]} = 
-61+{18-[2342-1]} = 
-61+{18-[2341]} = 
-61+{18-2341} = 
-61+{-2323} = 
-61-2323 = -2384

E) 42-{-24-[32×(8-5)+15÷3+4]-16} = 
42-{-24-[32.3+15:3+4]-16} = 
42-{-24-[96+5+4]-16} = 
42-{-24-[105]-16} = 
42-{-24-105-16} = 
42-{-145} = 
42+145 = 187

Regras dos sinais: 

+ com + = +
- com - = +
- com + = -
+ com - = -

Bons estudos! :-)