简便计算:745+263+155-198

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简便计算:745+263+155-198

简便计算:745+263+155-198
简便计算:745+263+155-198

简便计算:745+263+155-198
745+263+155-198
=745+263+155-200+2
=900+265-200
=700+265
=965

(745+155)+263+2-200
=900+265-200
=965

745+155+265—200=965

745+263+155-198
=745+155-198+263
=900-200+2+263
=700+265
=965

750+260+155-200+(-5+3+2)=905+60=965