2 3/4 : 1,1 + 3 1/3 : 5/7 - (2 1/5 + 4/5) • 0,375 =
= 11/4 : 11/10 + 10/3 : 5/7 - (11/5 + 4/5)• 3/8=
10/4 + 14/3 - 15/4 • 3/8= 10/4 + 14/3 - 45/32=
30/12 + 56/12 - 45/32= 86/12 - 45/32= 43/6 - 45/32= 688/96 - 135/96=543/96=181/32
(2/5 - 0,4 • 3 1/3) : (2,75 - 1/2) =
(2/5 - 4/10 • 4/3) : (11/4 - 2/4) =
(2/5 - 16/30) : 9/4 = (2/5 - 8/15) : 9/4 =
(6/15 - 8/15) : 9/4 = -2/15 : 9/4= -8/135