600 ??? 40 ??? 20 ??? 8 =18 600 ??? 40 ??? 20 ??? 8 =612 600 ??? 40 ??? 20 ??? 8 =548...

Question

600 ??? 40 ??? 20 ??? 8 =18
600 ??? 40 ??? 20 ??? 8 =612
600 ??? 40 ??? 20 ??? 8 =548
600 ??? 40 ??? 20 ??? 8 =308

Answer 1

4)600/40*20+8=308остальные не знаю,прости!