题型：解答题 怎样简便怎样算． 7.28-（0.8+3.28）3.15+1.83+6.85+2.1713.86-2.9913.92-（3.92-2.74）2.72-3.98+5.28-2.020.27-4.9+4.83+2.9． 查看答案
