简便计算:(309+139)÷(39-23)=

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简便计算:(309+139)÷(39-23)=简便计算:(309+139)÷(39-23)=简便计算:(309+139)÷(39-23)=(309+139)÷(39-23)=(309+139)÷16=

简便计算:(309+139)÷(39-23)=
简便计算:(309+139)÷(39-23)=

简便计算:(309+139)÷(39-23)=
(309+139)÷(39-23)=(309+139)÷16=(320-11+160-21)÷16=320÷16+160÷16-32÷16=20+10-2=28

28