五年级小数乘法的简便计算1、乘法交换律和结合律1.782.54 1.254.30.8 0.254.7841.25320.25 7.516 1.25162.52、乘法分配律254.4 8.81.25 3.60.251.2588 10.10.34 1020.4310.25.3 481.25 990.75 9.82.6 9.91.2 10.40.25（2.5+1.25）8 （8-0.8）1.2523.899+23.8 23.8101-23.81.482.5+1.487.5 8.822221.24.92984.9234.92 2.8103-2.822.83、变一变，能简便算480.56440.48 9.16534700.9167.20.330.28 4.87.8780.523.654.736.50.37 7.74（2.8-1.3）+1.52.2612.79.91.27 56.59.95.564、用减法的性质，可以简便计算4.731.21.8 6.832.51.53.75-（2.30.25） 16.123.13.886.917.253.20.756.8 19.18-（2.34-0.82）-7.66
