1/（2/3）/（3/4）/(4/5)/(5/6)=?

题目

1/（2/3）/（3/4）/(4/5)/(5/6)=?
能简算的要简算1.1997+1998+1999+2000+2001+2002+2003+2004
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2.138*5/4+23.3*（2-75%）-125%*38+（1+0.25）*28.7
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3.2008/2008又2009分之2008+2010分之1
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打得好还加分
加15哦

答案

1.=(1997+2003)+(1998+2002)+(1999+2001)+2004+2000=4000+4000+4000+2000+2004=160042.=138* 5/4 + 23.3* 5/4 + 38* 5/4 + 28.7* 5/4=5/4 * (138+23.3+38+28.7)=5/4 * (138+38+23.3+28.7)=5/4 * 228=2853.=2008/(200...