Question

A) 4,2 : 0,25

b) 7,8 : 0,5

c) 1,5 : (0,5) : -- (1,1)

Answer 1

a) 4,2/0,25 = (42/10)/(25/100) = (42/10).(100/25) = 42000/2500 = 420/25 = 84/5 = 16,8

b) 7,8/0,5 = (78/10)/(5/10) = (78/10).(10/5) = 780/50 = 78/5 = 15,6

c) 1,5/0,5/-(1,1) = (15/10)/(5/10)/(-11/10) = (15/10).(10/5)/(-11/10)

(150/50).(-10/11) = -1500/550 = -150/55 = -30/11 = -2,72

Espero ter ajudado.