305 060 - 305 - 129 352+106*1200+870 580 : 290

305.060-305-129.352+106•1.200+870.580:

:290=305.605

1) 106•1.200=127.200

2) 870.580:290=3.002

3) 305.060-305=304.755

4) 304.755-129.352=175.403

5) 175.403+127.200=302.603

6) 302.603+3.002=305.605