小數(shù)乘法簡便運算練習(xí)題

1、小數(shù)乘法簡便運算練習(xí)題一、簡便運算0.25 X8.5 X412.5 0.96 X).8 0.25 0.7344.36X2.5X80.25X6.241.25X.5X32 3.2 ).25X2.50.25X36二、簡便運算4.8 X10.13.6 X1Q2x(1.250.125) X80.391990.32X4033.65X0.10.85 X9.9三、簡便運算3.72X3.5+6.28X3.515.6 X2.115.6 X1.13.83X4.56+3.83 X5.4456.5 X99+56.57.09 X10.80.8乂7.099.7刈9+9.74.2 X99+4.227.5X3.77.5X3.7

2、3.9 X2.7+3.9乂7.3四、簡便運算2.3 X16+2.3 23+2.34.8 X10.13.6 X1Q2x5.4X1-5.410.7X6.1-15.1X0.77.74 X(2.8 - 1.3) + 1.5 X2.2610.6 X0.359.6 X0.357.6 X).8+0.2乂7.6五、簡便運算1.28 X8.6+0.72 X8.60.65X018.9X.01六、簡便運算4.8乂7.8+78 X0.52 1.87刈.9+0.1873.14 X0.68+31.4 X0.O3212.7刈.9+1.273.65 X4.736.5 X0.37101 X0.87-O.91 X87七、用簡便方

3、法計算6.66X3.3+6.66 X5.77.2 X0.2+2.4 X1.446 X57+23 X86小數(shù)乘法簡便計算練習(xí)題 小數(shù)乘法的簡便計算的方法：1、乘法交換律與結(jié)合律、分 配率的運用。（整數(shù)的運算定0.25 .73 X4律在小數(shù)中同樣適用）2、表面上看來，左右兩邊沒有相 同的因數(shù)，不能使用乘法分配 律。我們可以通過變一變，分 一分的方法找出相同因數(shù)再 運用乘法分配律進行計算0.25 $.5 X43.65X10.10.85 X9.912.5 0.96 0.83.65X10.10.85 X9.94.36 X12.5 X8 0.25 X16.2 41.25 X2.5X323.2X).25X2

4、.50.25X36(1.250.125) X84.8X10.13.6X102X4033.65X10.10.85 X9.90.39X1990.329.7刈9+9.73.72X3.5-卜6.28X3.515.6X2.1-15.6X1.14.8X7.8-78X0.5256.5 X99+56.57.09 X10.80.8乂7.091.87刈.9+0.1874.2 X99+4.23.8 X4.56+3.83 X5.443.65X4.736.5 X).3727.5X3.77.5X373.14 X0.68+31.4 X0.O327.2 X0.2+2.4 X1.45.4 X11-5.47.74X(2.81.3) +1.5 X2.263.9 X2.7+3.9乂7.312.7刈.9+1.272.3 X16+2.3 X23+2.3101 X0.87-O.91 X8746 X57+23 X8610.7 X16.1-15.1 X10.77.6乂).8+0.2乂7.61.28 X8.6+0.72 X8.610.6 X0.359.6 X0.358.9X1.010.65X10148 X).56+44 X).48 0.279X343+0.657 2790.264 X519+264 0.4819.16.5