123+321+234+432+345+543+...+789+987
123+321+234+432+345+543+...+789+987
简便计算:123+321+234+432+345+543+……+789+987
789+987-(123+321)+543+345 ?
123+234+345+543+432+321怎样简便
(123分之321+234分之345+543分之432)*(234分之345+543分之432+321分之123)-(1
一道数学题:123*321*789-345*234=?
123+321+456+654+789+987*123456789
123+321+456+654+789+987=?
123+321+456+654+789+987=》?
987*654*321+123*456*789=?
987+876+765+654+543+432+321+210简便计算
(321*321-123*123)/(543*543-345*345)要详细过程