www.qprq.net > 0.36x1.5╳0.4= 5.2ⅹ10.1= 用简算

0.36x1.5╳0.4= 5.2ⅹ10.1= 用简算

1 十五之七*0.375+十五分之八*37.5% 原式=7/15 *0.375+8/15 *0.375 =(7/15+8/15)*0.375 =0.375 2 【(四分之三-二分之一)*五分之四】*40% 原式=[(3/4-1/2)*4/5]*40% =[(3/4-1/2)*4/5]*2/5 =(3/4*4/5-1/2*4/5)*2/5 =(3/5-2/5)*2/5 =1/5*2/5 =1...

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