9.4减1.2除以0.6加6.24用简便方法怎么做
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X-(X-1)/2=1+(X+2)/5两边乘以1010X-5(X-1)=10+2(X+2)3X=9X=3
根据题意知:X/3=Y/4=Z/5设X/3=Y/4=Z/5=K则X=3K,Y=4K,Z=5K所以(X+Y)/(X-2Y+3Z)=(3K+4K)/(3K-2*4K+3*5K)=7K/(10K)=7/10
x=-1/3
3+3.9/[x-(1.2-0.7)]=4.23.9/(x-0.5)=1.212x-60=39x=33/4=8.25
19.6÷4.8-6.4÷4.8+5.4÷2.4=19.6÷4.8-6.4÷4.8+10.8÷4.8=(19.6-6.4+10.8)÷4.8=24÷4.8=5
=47.1*(9.4-0.4+1)=47.4*10.8=511.92再问:可如果不用减算的话,结果是471再答:错了=47.1*(9.4-0.4+1)=47.1*10=471对哦不起,太粗心了
4.5625
2x-(x+1)÷2=2+(x+1)÷22x-0.5x-0.5=2+0.5x+0.51.5x-0.5=0.5x+2.51.5x-0.5x=2.5+0.5x=3
(7*0.9+1.2)/(0.3-0.2)=75
7*0.9+1.2/0.3-0.2=25+()使等式成立?7*0.9+1.2/0.3-0.2=25+(-14.9)
1.2*4/3+7.2/24=1.6+0.3=1.9
题目打完了吗?x^2-x=96/x+
4.8/0.8+4.8/0.2=48/10*(10/8+10/2)=30再问:1除以0.125减0.875除以0.25能不能简便?写出过程。再答:1/(1/8)-7/8/(1/4)=1*8-7/8*4
(2x+1)/3-(x+1)/6=22(2x+1)-(x+1)=124x+2-x-1=123x=12-1x=11/3
12.5/3.6-7/9+8.3/3.6=125/36-28/36+83/36=(125-28+83)/36=180/36=5
[4]×[8]-[4]=96÷[4]+[4]=[28]5+8+9=1×(2+3+4+6+7)
原式为a÷0.08+a÷0.01=a÷0.2-60012.5a+100a=5a-600112.5a=5a-600600=-107.5aa=-6000/1075a=-240/43
65/4+37/4-26/4=(65+37-26)/4=76/4=19
1×2+3-4+5÷6÷7=1?