怎样简便怎样算．
7.28﹣（0.8+3.28）3.15+1.83+6.85+2.1713.86﹣2.99
13.92﹣（3.92﹣2.74）2.72﹣3.98+5.28﹣2.020.27﹣4.9+4.83+2.9．
计算下面各题，能简算的要简算．
10﹣3.57﹣5.4334.82﹣（3.82+15.2） 5.86﹣0.78+0.22 63.7﹣2.36﹣13.7﹣5.64．
4.5×0.6÷0.03×1.5．
脱式计算，能简便的要简便
57.6÷1.8×0.22.7×20110.85+0.56÷0.28．
用递式计算（能简算的要简算）
9.45﹣1.2×6.5=7.34×8.42+1.58×7.34=3.74÷0.25÷0.4=