www.gsyw.net > 46.8×0.247,2.08×60,2.5×0.6%1.8×0.5请用简便方...

46.8×0.247,2.08×60,2.5×0.6%1.8×0.5请用简便方...

2.08*60=2*60+0.08*60=120+4.8=124.8 ,2.5*0.6-1.8*0.5=1.5-0.9=0.6

2.5*0.6-1.8*0.5=5*0.5*0.6-1.8*0.5=(5*0.6-1.8)*0.5=(3-1.8)*0.5=1.2*0.5=0.6还可以更简便2.5*0.6-1.8*0.5=5*0.5*0.6-3*0.6*0.5=5*0.5*0.6-3*0.5*0.6=(5-3)*0.5*0.6=2*0.3=0.6

2.5*0.6+1.8*0.5=0.5(50.6+1.8)=0.54.8=2.4

不用简算,直接做即可2.5*0.6-1.8*0.5=1.5-0.9=0.6

2.5*0.61.8*0.5=2.5*0.6-0.6*1.5=1*0.6=0.6 希望能帮到你,请采纳正确答案.你的点赞或采纳是我继续帮助其他人的动力

2.5x0.6-1.8x0.5=2.5x0.6-0.6x1.5=(2.5-1.5)x0.6=1x0.6=0.6

2.5*0.6-1.8*0.5=0.5*5*0.6-1.8*0.5=0.5*3-1.8*0.5=0.5*(3-1.8)=0.5*1.2=0.6

2.5*0.6-1.8*0.5的简便算法=0.5x(5x0.6)-1.8x0.5=0.5x3-1.8x0.5=0.5x(3-1.8)=0.5x1.2=0.6

2.5*0.6-1.8*0.5=2.5*0.6-3*0.6*0.5=(2.5-3*0.5)*0.6=1*0.6=0.6

用简算脱式2.5*0.6-1.8*0.5:解:原式=2.5x(0.5+0.1)-1.8x0.5=2.5x0.5+2.5x0.1-1.8x0.5=(2.5-1.8)x0.5+2.5=0.7x0.5+2.5=0.35+2.5=2.85分析:主要考察拆分法

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