五年级上册数学小数乘法简便运算专项练习一、乘法交换律0.25×8.5×412.5×0.96×0.80.5×0.34×0.6二、乘法结合律4.36×12.5×80.95×0.25×40.75×50×0.4三、拆数+乘法结合律0.125×8.80.25×0.280.125×3.2×2.5四、乘法分配律(1.25-0.125)×8(125+2.5)×0.83.72×3.5+6.28×3.5五、把其中一个因数分成两个数的和或差，再按乘法分配律0.8×100.13.65×10.10.32×4034.6×0.90.85×1990.79×99六、添加因数“1”56.5×99+56.59.7×99+9.74.2×99+4.25.4×11-5.41.87×9.9+0.18712.7×9.9+1.27七、更改因数的小数点位置6.66×3.3+0.666×6746×57+23×864.8×7.8+78×0.523.14×0.68+31.4×0.032101×0.87-0.91×872.3×16+2.3×23+2.3314×0.043+3.14×7.2-31.4×0.15八、除法的性质正用:a÷b÷c=a÷(b×c)320÷1.25÷83.52÷2.5÷0.49.6÷0.8÷4逆用:a÷(b×c)=a÷b÷c3.9÷(1.3×5)15÷(0.15×0.4)75.3÷(7.53×20)九、综合练习题5×1.03×0.232×1.250.45×990.125×9645×1.58+5.5×15.89.99×2.22+3.33×3.34