71x63/70 2011x2011/2012 简便计算
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71x63/702011x2011/2012简便计算71x63/702011x2011/2012简便计算71x63/702011x2011/2012简便计算71x63/70=(70+1)x63/70=
71x63/70 2011x2011/2012 简便计算
71x63/70 2011x2011/2012 简便计算
71x63/70 2011x2011/2012 简便计算
71x63/70 =(70+1) x63/70 =63+63/70 =63+9/10 =63.9 2011x2011/2012 =(2012-1) x2011/2012 =2011-2011/2012 =2010又1/2012
71x63/70 2011x2011/2012 简便计算
（-1 2010/2011）X2011
已知/X1-1/+/X2-2/+/X3-3/+...+/X2010-2010/+/X2011-2011/=0,试求代数式2X1-2X2-...-2X2010+2X2011的值
|x1-1|+|x2-2|+|x3-3|+⋯+|x2011-2011|+|x2012-2012|=0求代数式x1+x2+x3+x4+⋯+x2011+x2012的值.
2011三次方-2x2011的平方-2009/2011三次方-2011平方-2010
解方程x/1x2+x/2x3+x/3x4+.+x/2011x2011=2011
2013!-(1!+2!x2+3!+4!x4+.+2011!x2011+2012!x2012)=
（-1 2010/2011）X2011简便计算
X1,2X...x2011都是正数 a=(X1+X2...+x2010)（X2+X3...+x2011）b=(X1+X2...+x2011)(X2+X3...+x2010）比较a,b大小
简便运算3.75x99+3.75 0.4x63x2.5 2x63.29+2x36.71 0.02x38.7x50 4.9x1.01
2012x2012-2012份之2011x2011+2011简便
因式分解 ①99²+99 ②2011²-2010X2011
2012分之2011x2011 用简便计算怎么算,
1/1x2+1/2x3+.1/2010x2011=?
2010的2次方-2009x2011 等于多少?
14x63%+5.2 (49/11+3.1+17/11+16.9)X5/2 (用简便计算)
已知|x1-1|+|x2-2|+|x3-3|+...+|x2010-2011|=0,试求代数式2x1-2x2-2x3-…-2x2010+2x2011的值
4x/1x2+4x/2x3+4x/4x5+4x/5x6+.+4x/2010x2011+4x/2011x2012=1