1) 3/2/3 - (-1/5/6) - 2/4/5
= 3/6 - (-1/30) - 2/20
= 1/2 + 1/30 - 1/10
= 15/30 + 1/30 - 3/30
= 13/30

2) -0,1 + 8/1/3 - 4,4 - (-2/3/4)
= -0.1 + 24 - 4.4 - (-2/12)
= -0.1 + 24 - 4.4 + 1/6
= 23.9 - 4.4 + 1/6
= 19.5 + 1/6
= (117 + 1) / 6
= 118/6
= 19.67