best_wish
幼苗
共回答了21个问题采纳率:85.7% 举报
1.2005*2003/2004
=(2004+1)(2004-1)/2004
=2004*2004-1/2004
=2004-1/2004
=2003+2003/2004
2.24*51/43+51*19/43
=51/43(24+19)
=51
3.5*1/5÷5*4/5
=1÷5*4/5
=4/25
4.(8/9+2/3-2/27)*27
=8/9*27+2/3*27-2/27*27
=24+18-2
=40
1年前
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