1×2÷3×4÷5×6÷7×8÷9×10÷11×12
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要过程，有分。谢谢
原式=1*（2/3）*(4/5)*(6/7)*(8/9)*(10/11)*12
=(2*4*6*8*10*12)/(3*5*7*9*11)
=2*4*8*(6/3)*(10/5)*(12/9)*11/7
=64*2*2*(4/3)*11/7
=1024*11/(3*7)
=11264/21
=536.3809
=(2*4*6*8*10*12)/(3*5*7*9*11)
=2*4*8*(6/3)*(10/5)*(12/9)*11/7
=64*2*2*(4/3)*11/7
=1024*11/(3*7)
=11264/21
=536.3809
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第1个回答 2011-04-29
=1*（2/3）*(4/5)*(6/7)*(8/9)*(10/11)*12
=(2*4*6*8*10*12)/(3*5*7*9*11)
=2*4*8*(6/3)*(10/5)*(12/9)*11/7
=64*2*2*(4/3)*11/7
=1024*11/(3*7)
=11264/21
=(2*4*6*8*10*12)/(3*5*7*9*11)
=2*4*8*(6/3)*(10/5)*(12/9)*11/7
=64*2*2*(4/3)*11/7
=1024*11/(3*7)
=11264/21
第2个回答 2011-05-05
用结合律：原式=（1*2*4*6*8*10*12）/（3*6*9*11）=7680/297=25.86
