(2 1/2-1.805):1.39 +4:2.5 помогите плз

Question

(2 1/2-1.805):1.39 +4:2.5

помогите плз

Answer 1

(2 1/2-1.805):1.39 +4:2.5=(2.5-1.805):1.39+1.6=0.695:1.39+1.6=0.5+1.6=2.1

Answer 2

(2 1/2-1,805)/1,39 +4/2,5 = (2,5-1,805)/1,39 +1,6 = 0,695/1,39 +1,6 =0,5+1,6 =2,1