23/4÷1,1+3 1/3 ÷5/7 -(2 1/6 +4/5)* 0,375 2/5-0,4*3 1/3 2,75- 1 1/2 с решением

23/4 : 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