Question

mim ajudem com essa pfv: (5/6-1/3) + (2/4 - 1)

1/5 + [(3/2+5)- 3/4]

-9/2+[4/3+(1/4 - 5/3)] + 5/4

Answer 1

a) (5/6-1/3) + (2/4 -1)
(30 - 5)/6 + (2 - 4)/4 = 25/6 -2/4 = (100 - 12)/24 = 88/24 = 22/6

b) 1/5 + [(3/2+5) - 3/4] = 1/5 + [(3+10)/2 - 3/4] = 1/5 + [13/2 - 3/4] = 1/5 + [(26-3)/4]
1/5 + 23/4 = (4+115)/4 = 119/4

c) -9/2 + [4/3 + (1/4 - 5/3)] + 5/4 = -9/2 + [4/3 + (3-20)/12] + 5/4 = 
-9/2 + [4/3 - 17/12] +5/4 = -9/2 + [(16 - 17)/12] + 5/4 = -9/2 -1/12 + 5/4 =
(-54 - 1 + 15)/12 = -38/12 = -19/6

Espero ter ajudado.