1) 43 2/3 : 26,2+(846 - 10 2/3)=131/3:131/5+835 1/3=5/3+835/3=840/3=280
2) (56,03*4,6-256,848):0,005=(257,738-256,848)200=0,89*200=89*2=178
3) (17,6 : 4 5/7 + 2 1/3) 1 2/13=(88/5:33/7 + 7/3) 15/13=(88*7/(5*33) + 7/3) 15/13=(8*7/(5*3) + 7/3) 15/13=(56/15 + 7/3) 15/13=(56+35)/15 * 15/13=91/13=7