小数点加减竖式计算

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小数点加减竖式计算
已知a+x²=2008,b+x²=2009,c+x²=2010,且abc=3求a/bc+c/ab+b/ac-1/a-1/b-1/c的值 不等式证明根号a平方+b平方除以2小于等于3次根号a立方+b立方除以2 负根号3除以2小于等于x的平方小于等于1 这个不等式怎么算 根据汉语提示完成句子,一空一词(1)我们应该尽量少犯错We shouid try ( ) ( ) ( )mistakes(2)我们20年后的生活会怎么样What ( )our life ( )( )( )twenty years?虽然很忙,但我还是挤出时间做运动( )I'm busy ,I st (英语)1.Can you help me?(同义句)Can you _____ _____ ____ hand?2.Something is wrong with my bike.(同义句)____ _____ ____ with my bike. 懂英语的帮忙看看下面的几道题根据首字母及英语解释写单词或短语“I to give attention in hearingr to understand a language in writing or printingy period from january 1 st to december 31 stf before anyone or anything else (√2+√3)指数2008x(√2-√3)指数2009等于多少 1+2+3+4+5+6.加到99=?急哥哥告诉我了(1+2+3+4....100)-10=4950 2分之1加3分之1一直加到9分之1,和是多少?如题,有没有简便方法 2乘3分之1加3乘4分之1一直加到99乘100分之1的简便计算 100乘101分之一加到n(n加1)分之一 a=2005x+2004,b+2005x+2005,2005x+2006求(a-b)^2+(b-c)^2+(c-d)^2 若a=2007+2x2,b=2008+2x2,c=2009+2x2,求a2+b2+c2-ab-bc-ac 已知a=1/99x+2009,b=1/99x+2008,c=1/99x+2010,求代数式a2+b2+c2-ab-bc-ac的值. 用 be 的适当形式填空.1.Those___________his grandparents.2.That_____________my sister.3.Dick and Joy____________my friends.4.My brothers__________________Miss Li’s students. nowadays,maketing strategy differs greatly from()A.that past B,past C.that of past D.the past答案给的是D,C为什么不对? {2004x-2005y=1,和2006X-2007Y=5,则x-y=? 计算1+5+5^2+5^3+.+5^99+5^100观察发现,上式从第二项起,每项都是它前面一项的5倍,如果将上式各项都乘以5,所得新算式中除个别项外,其余与原式中的项相同,于是两式相减将使差易于计算.设S=1+5+5^2+ 1+1/3+1/3^2+1/3^3……+1/3^2000 2000*(1-1/2*)*(1-1/3)*...*(1-1999)*(1-1/2000) (1-1/2)*(1+1/2)*(1-1/3)*(1+1/3)*(1-1/4)*(1+1/4)*.*(1-1/2000)*(1+1/2000)求在半个小时之内解答! 1+2+3+.2000+2001= 句形转换.(一般疑问句.肯定回答及否定回答)1、 He has two oranges .2、 His parents hare many motebooks .3、 I hare a backpack .4、 Lucy has three clocks .5、 Lucy and lily hare plants .呃 打快了 所有的hare 都是 have 圆的周长是50.24厘米,圆的面积与长方形的面积相等,这个长方形的的长是多少厘米?不是256cm.我认为是25.12,256cm算的是直径,不是半径 英语初中七年级语法英语并列句练习用both.and.连接句子Tom plays football.He plays basketball,too.Lucy‘s mother is a doctor.Her father is also a doctor.Peter has finished his homework.Mary has finished her homework,too.Part Two is (保持原句意思)共五题1 He can’t decide where he should stay for the night.He can't decide ( ) ( ) stay for the night.2 You needn't thank me,sir.( )no( ) for you to thank me.3The ID card is not the only thing that i have lost.The ID card 圆的面积与长方形的面积相等,圆的周长是25.12CM,长方形宽等于圆的半径,求长方形去掉1/4个圆后的面积. 解以二元一次方程组:2009x+2008y=2007,2007x+2006y=2005 解二元一次方程组2005x+2006y=2007,2006x+2005y=2008 第九题选撒 第九题 第六题撒