999*222+333*334的简便算法 999*222+333*334 =333+3*222+333*334 =333*(666+334) =333*1000 =333000
999×222+333×334 = 999×222+333×333+333 = 999×(222+111)+333 = 999×333+333 = 1000×333 = 333000
999×222+333×334 =333×3×222+333×334 =333×666+333×334 =333×（666+334） =333×1000 =333000
111^2*18+111^2*9+333=111^2*27+333=111(111*27+3)=111*3*(999+1)=333000
没有简便公式 999*222+333*334=333*(222*3）+333*334=333*（666+334）=333000
答：333×334+999×222 =333×334+333×666 =333×1000 =333000详情>>
答：详情>>
