999.
999.
黄金999.
化简999...9*999...9+1999...9
98+998+9998+...+999...9998
999...99除以74的余数是多少
999...9×999...9+1999...9的末尾有多少个0...是1997个9
999...98(1997个9)*999...98(1997个9)+999...98(1997个9)*2的末尾有多少个0
999...9×999...9+1999...9的末尾有多少个0第一个999...9有200个9,第二个999...9也有200个9,第三个1999...9不看1,也有200个9
98+998+9998+...+999...98(50个9)
Sorry,Unable to process request at this time -- error 999.
999...9(1998个9)*999...9(1998个9)+1999...9(1998个9)=?简便计算
求这算式的解法:999...9(2000个9)乘999...96(1999个9)=
计算:999...99*999...99+1999...99;(9的个数是2001个)答案和算式
计算:999...9(n个9)*999...9(n个9)+1999...9(n个9)
化简999...999(2008个9)*999...999(2008个9)+199...999(2008个9)
999...99(有1997个9)*999...9(有1997个9)+1999...99(有1997个9)的末尾有( )0
999...9(1997个9)*999...9(1997个9)+1999...9(1997个9)的末尾有多少个零?
777...77 * 999...99=( ) 1000个7 1000个9