Respostas

2014-03-09T23:49:40-03:00
2-5-¹+(-3)³ 
2-0,5x10-9
 2-10-9
 2-19
 -17
2014-03-10T00:46:41-03:00
2(0)-5(-1)+(-3)(3): 1 - 1/5(1) +(-27). Extrai- se o MMC (1,5,1=5), logo fica: 5-1-135/5 = -131/5.