怎样简便怎样算．
18.76×9.9+1.876                   3.52÷2.5÷0.4             3.65×10.1
1.25×2.5×32                      3.9﹣4.1+6.1﹣5.9           3.75﹣（3.75+6.48）
15.6×13.1﹣15.6﹣15.6×2.1         56.5×9.9+5.65．