0.875+= = =1.25×0.16×8= 1÷0.5×2= =
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.