小数乘法简便运算练习题.pdf

小数乘法简便计算练习题小数乘法简便计算练习题班级班级姓名姓名小数乘法的简便计算的方法：1、乘法交换律与结合律、分配率的运用。（整数的运算定律在小数中同样适用）2、表面上看来，左右两边没有相同的因数，不能使用乘法分配律。我们可以通过变一变，分一分的方法找出相同因数再运用乘法分配律进行计算0.250.258.58.54 412.512.50.960.960.80.80.250.7340.250.7344.364.3612.512.58 80.250.2516.216.24 41.251.252.52.532323.23.20.250.2512.512.50.25360.2536(1.25(1.250.125)0.125)8 84.84.810.110.13.63.61021020.391990.391990.324030.324033.6510.13.6510.10.850.859.99.93.723.723.53.56.286.283.53.515.615.62.12.115.615.61.11.14.84.87.87.878780.520.5256.556.5999956.556.57.097.0910.810.80.80.87.097.091.871.879.99.90.1870.1874.24.299994.24.21/33.83.84.564.563.833.835.445.449.79.799999.79.727.527.53.73.77.57.53.73.73.143.140.680.6831.431.40.0320.0327.27.20.20.22.42.41.41.45.45.411-5.411-5.47.747.74（2.82.81.31.3）1.51.52.262.263.93.92.72.73.93.97.37.312.712.79.99.91.271.272.32.316+2.316+2.323+2.323+2.33.653.654.74.736.536.50.370.371011010.87-0.910.87-0.918787464657572323868610.716.110.716.1-15.110.715.110.77.67.60.80.80.20.27.67.61.281.288.68.60.720.728.68.610.610.60.350.359.69.60.350.358.98.91.011.010.650.6510110148480.560.5644440.480.480.2790.2793433430.6570.6572792790.2640.2645195192642640.4810.4819.169.161.531.530.0530.05391.691.60.1250.125969612.512.510.810.8（20204 4）0.250.252/34545212150502.12.145451.581.585.55.515.815.825257.37.30.40.43/3