小数乘除法

一、用竖式计算下列各题（除不尽的保留三位小数）

31.5×24.50.8×0.564.23×0.0280.63×1.05

34.3÷0.2336×0.560.32÷0.26.728÷3.2

3.45×844.6×250.41×561.05×305

0.076×242.3÷5.58.63×0.428.63÷0.42

0.38×2.61.24÷1.53.2×1.80.32÷0.9

214×0.372.6×251.06×300.156×15=

二、脱式计算（能简算的要简算）

0.125×0.25×8×47.4×0.28+0.28×2.64.8×0.9+0.48

（4－0.4）×2.52.5×（0.77×0.4）6.1×3.6＋3.9×3.6

（4+0.4）×2.58×7×0.12510－2.3×1.2

3.9×9.9+0.394.5×1.2＋2.3（0.4+1.25）×0.8

9.4×6.1×2.33.25×4.76－7.818.1×0.92＋3.93

三、方程提高题

10-3x=439-5x=9X-0.28x=0.36

44-5x=4100-20x=209-4x=1

88-x=8025-5x=1540÷(120÷x)=5