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25x-8=2（60+15）÷x=34（1+12）x-34x=0.81.8x=34：1612×（47+x）=1152x+30%x=5223x-0.8x-6=16x-12x=42．　&
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分析与解答
习题“2/5x-8=2（60+15）÷x=3/4（1+1/2）x-3/4x=0.81.8/x=3/4：1/612×（47+x）=1152x+30%x=522/3x-0.8x-6=16x-1/2x=42．”的分析与解答如下所示：
（1）根据等式的性质，在方程两边同时加上8，再同时乘52求解；（2）先化简得75÷x=34，再根据等式的性质，在方程两边同时乘x，再同时乘43求解；（3）先化简得34x=0.8，再根据等式的性质，在方程两边同时乘43求解；（4）先根据比例的基本性质，把原式转化为34x=1.8×16，再根据等式的性质，在方程两边同时乘43求解；（5）根据等式的性质，在方程两边同时除以12，再同时减去47求解；（6）先化简得1.3x=52，再根据等式的性质，在方程两边同时除以1.3求解；（7）先化简得-215x-6=16，再根据等式的性质，在方程两边同时加上6，再同时乘-152求解；（8）先化简得12x=42，再根据等式的性质，在方程两边同时乘2求解．
解：（1）25x-8=2，25x-8+8=2+8，25x=10，25x×52=10×52，&&&&&&&&&&&& x=25；（2）（60+15）÷x=34，&&&&&&&&&&& 75÷x=34，&&&&&&&& 75÷x×x=34×x，34x×43=75×43，&&&&&&&&&&&&&&& x=100； （3）（1+12）x-34x=0.8，34x=0.8，34x×43=45×43，&&&&&&&&&&&&&&&&& x=1615；（4）1.8x=34：16，34x=1.8×16，34x×43=95×16×43，&&&&& &&x=25；（5）12×（47+x）=1152，&12×（47+x）÷12=1152÷12，&&&&&&&&&&&& 47+x=96，&&&&&&&&&&47+x-47=96-47，&&&&&&&&&&&&&&& x=49；（6）x+30%x=52，&& &&& 1.3x=52，&&1.3x÷1.3=52÷1.3，&& &&&&&& x=40；（7）23x-0.8x-6=16，-215x-6+6=16+6，-215x×=22×，&&&&&&&& &&&& x=-165；（8）x-12x=42，12x=42，12x×2=42×2，&&&&&&&& x=84．
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2/5x-8=2（60+15）÷x=3/4（1+1/2）x-3/4x=0.81.8/x=3/4：1/612×（47+x）=1152x+30%x=522/3x-0.8x-6=16x-1/2x=42．...
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经过分析，习题“2/5x-8=2（60+15）÷x=3/4（1+1/2）x-3/4x=0.81.8/x=3/4：1/612×（47+x）=1152x+30%x=522/3x-0.8x-6=16x-1/2x=42．”主要考察你对“苏教版数学五年级下学期”
等考点的理解。
因为篇幅有限，只列出部分考点，详细请访问。
苏教版数学五年级下学期
与“2/5x-8=2（60+15）÷x=3/4（1+1/2）x-3/4x=0.81.8/x=3/4：1/612×（47+x）=1152x+30%x=522/3x-0.8x-6=16x-1/2x=42．”相似的题目：
求未知数x的值x+34=78x-35=1-35．&&&&
根据下列各串数的规律，在括号中填入适当的数．（1）1、4、7、10、&&&&、16（2）6、7、3、0、3、3、6、9、5、&&&&（3）28、26、24、22、&&&&、18、16（4）0、1、1、2、3、5、8、&&&&、&&&&（5）观察规律，补充算式．21×9=189321×9=28898954321×9=&&&&．
整个六个面写着1-6六个数字的正方体，如图排列．已知每个正方体相对的两个面的数字和是7，紧贴着的两个面的和是8，？处的数是&&&&．
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数学难题求解1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
XX20041/2X3+2/3X5+3/5X8+4/8X12+5/12X17
注意.例如1/2x3为2乘以3分之12009除以/2010(47/56 + 656 )除以1+/2+
众神拜大婶551
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设1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256=a两边同时×1/2得1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512=1/2aa-1/2a=1/2-1/512=255/512=1/2aa=255/256 XX×（5+98+1-4）=2004×（100）...
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