712-148+192-352
=712+192-148-352
=904-352-148
=904-(352+148)
=904-500
=404
简便计算:712-148+192-352
712-148+192-352
=(712+192)-(352+148)
=904-500
=404
712-148+192-352的简便计算为:
=(712+192)-(148+352)
=900-500
=400
712-148+192-352
=712+192-(148+352)
=904-500=404
712-148+192-352
=712+192-(148+352)
=904-500
=404