计算下面各题,能简算的要简算.0.125×3.21×8 7.3×1.2﹣1.8 20÷0.4÷2.5 8.6×2.6+1.4×2.6 4.6×102.
2.5×(1.9+1.9+1.9+1.9)
÷20.
2008×+200.8×4.3+20.08×8.
3.142+68.6×0.314.
9.9×3.7+0.37.