Resposta :
Resposta:
A) 35+[-21-(-12+15)]
35+[-21+12-15]
35-21+12-15
35+12-21-15
47-36
11
B) -20-[21+(-20-16)]
-20-[21-36]
-20-21+36
-41+36
-5
D) -(-30)-[37-(35-31-34)-36]
30-[37-35+31+34-36]
30-37+35-31-34+36
30+35+36-37-31-34
101-102
-1
Espero ter ajudado ~( ⁰ 3 ⁰ )~