小数乘除法简便运算分类练习2页.doc

小数乘法简便运算分类练习题一、乘法交换律 0.258.54 12.50.960.8 0.250.734 0.2516.24二乘法结合律 4.3612.58 0.950.254 350.20.50.75500.4三、乘法分配律(1.250.125)8 （204）0.25 (2+0.4)5 （125+2.5）0.84、 乘法分配律逆应用3.723.56.283.515.62.115.61.1 3.834.563.835.447.0910.80.87.09 27.53.77.53.7 3.92.73.97.310.60.359.60.35 7.60.80.27.6