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o.25x4.8x0.5的简便计算

o.25x4.8x0.5 =0.25×4×1.2×0.5 =0.25×4×0.6×2×0.5 =1×0.6×1 =0.6

0.25*4.8*0.5 =0.25X4X0.6X0.5 =1X0.3 =0.3

4.8-4.8X0.5 =4.8x(1-0.5) =4.8x0.5 =2.4 祝天天向上。

4.8-4.8*0.5=4.8*(1-0.5)=4.8*0.5=2.4

=0.47x(0.5X0.8) =0.47x0.4 =0.188

原式 =0.85x0.5+0.25x2x0.15 =0.85x0.5+0.5x0.15 =(0.85+0.15)x0.5 =1x0.5 =0.5

=0.125x8x0.25x4x0.5x2 =1x1x1 =1

0.89(4.8+5.2)=8.9

2.33×0.5×0.4×5 =2.33×0.5×(0.4×5) =2.33×(0.5×2) =2.33×1 =2.33

解:原式=0.4x(0.25+0.5) =0.4x0.25+0.4x0.5 =0.1+0.2 =0.3 分析:主要考察分配律的运用。

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