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4.8%4.8x0.5的梯式简便运算

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

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

=(0.625*0.04)*(0.8*0.5)=0.025*0.4=0.01

先算4乘0.5得2,再算2乘0.5得一,最后结果,2.33

5.2一5.2x0.5一0.5 =5.2x(1-0.5)-0.5 =5.2x0.5-0.5 =0.5x(5.2-1) =0.5x4.2 =2.1

14.8-4.8加括号分别乘0.5,再用14.8×0.5的结果减去4.8×0.5的结果就得出最后结果了。

供参考

0.5×4×2.5×4×12.5×4 =1×10×50=500

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

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