7.85+2.34-0.85+4.66巧算=（7.85-0.85）+（2.34+4.66）=7+7=14
7.85+2.34-0.85+4.66=7.85 - 0.85 + (2.34 + 4.66)=……望采纳，O(∩_∩)O谢谢！
