Question

53,4 - 20/89 - 36,9* 17 7/9

Answer 1

53,4-20/89-36,9*160/9=53,4+20/89-369/100*160/9=53,4-20/89-41/10*16/1=53,4-65,6-20/89=-12,2-20/89=-12-(2/10+20/89)=-12-((178+200)/890)=-12-(378/890)=-12 189/445 вроде так