123456+23456+345612+456123+561234+612345
=146912+345612+456123+561234+612345
=492524+456123+561234+612345
=948647+561234+612345
=1509881+612345
=2122226
追问这不是简便运算,亲
追答123456+23456+345612+456123+561234+612345
=(1+2+3+4+5+6)*111111-(234561-23456)
=2122226