А)(22,5/0,45)/(5,27+1,93)=50/7,5=500/75=6⁶⁸/₁₀₀=6¹⁷/₂₅.
б)(7,6-8,5)/(0,23+2,92)= - 0,9/3,15= - 90/315= - ²/₇.
в)35,4*(62,4-49,9)-12,5*15,4=35,4*12,5-12,5*15,4=12,5*(35,4-15,4)=
12,5*20=250.
г)12,48/(1,23+1,17)-14,7/0,49=12,48/2,4-14,7/0,49=124,8/24-1470/49=
5,2-30= - 24,8.