1089

и竒盽ǎ计臸砃ㄤ龟琌М计厩笴栏絵硂笴栏碞М糶κ计ゑ计计ぇ碻˙艼秈︽笴栏(1)盢ㄓ计κ计㎝计が传眔穝计璸衡计搭穝计(ヒ)
(2) 瓃畉(ヒ)狦琌计玥κ计干0盢计κ计㎝计が传眔穝计()盢ヒ㎝Мㄆ祇ネ

ぐ或穦硂妓㎡?

狦块计κ计a 计b计cê或˙艼(1)穝计琌100c+10b+aτ

100a+10b+c-(100c+10b+a)∽[100(a-1)+10(b+9)+(c+10)]-(100c+10b+a)
∽100(a-c-1)+90+(c-a+10)

˙艼(2)∽100(c-a+10)+90+(a-c-1)
┮ヒ+∽[100(a-c-1)+90+(c-a+10)]+[100(c-a+10)+90+(a-c-1)]∽100
⊙9+180+9∽1089

 

 


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