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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

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

0.25x4.8x0.5用简便法算 =0.25x4x1.2x0.5 =1x0.6 =0.6

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

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

64X0.25X0.5X1.25 =(4x2x8)x0.25x0.5x1.25 =(4x0.25)x(2x0.5)(8x1.25) =1x1x10 =10 运用乘法交换律、结合律。

由题目意思来看,应该是 0.85x0.5+0.25x3 =0.85x0.5+0.5x0.5x3 =0.85x0.5+0.5x0.15 =(0.85+0.15)x0.5 =1x0.5=0.5。

2·5x0.8-1.8x0.5 =2.5x0.8-0.8x0.5-1x0.5 =0.8x(2.5-0.5)-0.5 =0.8x2-0.5 =1.5-0.5 =1.1 朋友,请及时采纳正确答案,下次还可能帮您,您采纳正确答案,您也可以得到财富值,谢谢。

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