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2:(x%1)=4/5能简要简

9/20

2:(1-X)=4/5 4(1-X)=2*5 4(1-X)=10 1-X=2.5 -X=2.5-1 -X=1.5 X=-1.5

3.5*5/4+5/4+3/2÷4/5 =5/4(3.5+1+3/2) =5/4*6 =15/2 2分之15=7.5

你将(1/2+1/3+1/4)提取出来,然后让(1+1/2+1/3+1/4)-(1/2+1/3+1/4+1+5)

解:可以 (0.75+1/5)x5.19 =(0.75+0.2)x5.19 =0.95x5.19 =1x5.19-0.05x5.19 =5.19-0.2595 =4.9305

1、题目有误,分子与分母颠倒了,倒数第二个乘式中应为减号 原式=(3/2)*(5/4)*(7/6)*(9/8)*(11/10)*(2/3)*(4/5)*(6/7)*(8/9)=11/10 约分后等于10分之11 2、由题意知,二毛的速度是小毛的1.25倍,大毛是小毛的1.5倍,设小毛跑...

1.25x2/3-2/3x1/4 =2/3x(1.25-0.25) =2/3x1 =2/3 =3分之2 朋友,请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

5.04x(4.32÷1.2) =5.04×3.6 =18.144 直接算最简便

(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)x(1/2+1/3+1/4) =(1/2+1/3+1/4+1/5)+(1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1/2+1/3+1/4)-(1/2+1/3+1/4+1/5)×(1/2+1/3+1/4) =(1/2+1/3+1/4+1/5)-(1/2+1/3+1/4) =1/5

X-80%=25%x14 x-0.8=3.5 x=4.3 1/2X+30%X=4/5÷20% 0.8x=4 x=5 (1-X):4=0.5:8 8(1-x)=2 1-x=1/4 x=3/4 1/2+20%X=0.875 0.5+0.2x=0.875 0.2x=0.375 x=1.857 4/9X-12x85%=3/8 4/9x-51/5=3/8 4/9x=423/40 x=3807/160

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