2017-06-17 · 知道合伙人教育行家
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[630-(303-99)]*17
=[630-(303-100+1)]*17
=[630-104]*17
=[630-100-4]*17
=(330-4)*17
=326*(20-3)
=326*20-326*3
=6520-978
=6520-(1000-22)
=6520-1000+20
=5520+20
=5540
=[630-(303-100+1)]*17
=[630-104]*17
=[630-100-4]*17
=(330-4)*17
=326*(20-3)
=326*20-326*3
=6520-978
=6520-(1000-22)
=6520-1000+20
=5520+20
=5540
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