(6409+23*17)/68怎样用简便方法算,谢谢!

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(6409+23*17)/68怎样用简便方法算,谢谢!(6409+23*17)/68怎样用简便方法算,谢谢!(6409+23*17)/68怎样用简便方法算,谢谢!(6409+23*17)/68=(17

(6409+23*17)/68怎样用简便方法算,谢谢!
(6409+23*17)/68怎样用简便方法算,谢谢!

(6409+23*17)/68怎样用简便方法算,谢谢!
(6409+23*17)/68
=(17×377+23×17)/68
=17(377+23)/68
=17×4×100/(17×4)
=100