1+2+5+8+6+93+21+47+74+89＝
人气：393 ℃ 时间：2019-12-13 10:13:10
解答
1+2+5+8+6+93+21+47+74+89
=(1+89)+(6+74)+(47+93)+(2+8)+(5+21)
=90+80+140+10+20+6
=(90+10)+(80+20)+(140+6)
=100+100+146
=346
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