Question

Eliminando parênteses, colchetes e chaves, determine as somas algébricas:
A) 37 + [-25 - (-11 + 19 -4)]

B) 39 + [-10 -(+32 - 10 - 8) +9

Answer 1

a) 37+[-25-(-11+19-4)]

37+[-25-(-4)]

37+[25+4]

37+29

66

b) 39+[-10-(+32-10-8)+9]

39+[-10-18]+9

39+[-28]+9

39-28+9

11+9

20