3/8:5/12-3 1/2*2/5+ 1 : 3 1/3=3/8 * 12/5 - 7/2 * 2/5 + 1 : 10/3=9/10 - 7/5 +3/10=12/10 - 7/5=1 2/10-1 2/5=1/5 - 2/5=-1/5=-0,2
(4 7/12 - 5 3/4) : (7/36 - 1 1/6)=(- 5 3/4 + 4 7/12) : ( 7/36 - 7/6) = - 1 2/12 : (7/36 -42/36) = -1 1/6 :(-35/36) = 7/6 * 36/35 = 6/5 = 1 1/5 = 1,2