小数乘法简便运算练习题.doc

.小数乘法简便运算练习题一、简便运算0.258.5412.50.960.80.250.7344.3612.580.2516.241.252.5323.20.2512.50.2536二、简便运算(1.250.125)84.810.1 3.61020.391990.324033.6510.10.859.9三、简便运算3.723.56.283.515.62.115.61.13.834.563.835.4456.59956.57.0910.80.87.099.7999.74.2994.227.53.77.53.73.92.73.97.3 四、简便运算2.316+2.323+2.35.411-5.410.716.1-15.110.77.74（2.81.3）1.52.2610.60.359.60.357.60.80.27.6五、简便运算1.288.60.728.60.651018.91.01六、简便运算4.87.8780.521.879.90.1873.140.6831.40.03212.79.91.273.654.736.50.371010.87-0.9187七、用简便方法计算6.663.3+6.666.77.20.22.41.446572386小数乘法简便计算练习题 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 0.258.54 12.50.960.8 0.250.734 4.3612.58 0.2516.24 1.252.5323.20.2512.5 0.2536 (1.250.125)8 4.810.1 3.6102 0.39199 0.32403 3.6510.1 0.859.9 3.723.56.283.5 15.62.115.61.1 4.87.8780.52 56.59956.5 7.0910.80.87.09 1.879.90.187 4.2994.2 3.84.563.835.44 9.7999.727.53.77.53.7 3.140.6831.40.032 7.20.22.41.4 5.411-5.4 7.74（2.81.3）1.52.263.92.73.97.3 12.79.91.27 2.316+2.323+2.3 3.654.7 36.50.37 1010.87-0.9187 46572386 10.716.1-15.110.7 7.60.80.27.6 1.288.60.728.6 10.60.359.60.35 8.91.01 0.65101 480.56440.48 0.2793430.6572790.2645192640.481 9.161.530.05391.60.12596 12.510.8 （204）0.25 4521502.1 451.585.515.8 257.30.4 .