25ﾁ7ﾾ29ﾁ7ﾾ248的简便运算

Question

如题所述

Answer 1

25ﾁ7ﾾ29ﾁ7ﾾ248
=257+297+248
=250+7+300-3+250-2
=250+250+300+7-3-2
=800+2
=802
满意采纳奥