如题所述
25x57+25x42+25
=25x57+25x42+25x1
=25xï¼57+42+1ï¼ï¼ä¹æ³åé çï¼
=25x100
=2500
=25x57+25x42+25x1
=25xï¼57+42+1ï¼ï¼ä¹æ³åé çï¼
=25x100
=2500
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第1个回答 2014-11-27
25*(57+42+1)=25*100=2500