数学题巧算。
请说明详细的巧算方法及思路。
1又1/12=13/12
1/2+1/3+1/4=13/12
(13/12+1/2+1/3+1/4)/(1/2+1/3+1/4)
=13/12/(13/12)+(1/2+1/3+1/4)/(1/2+1/3+1/4)
=13/12/(13/12)+1
=1+1
=2。
1又1/12=13/12
1/2+1/3+1/4=13/12
(13/12+1/2+1/3+1/4)/(1/2+1/3+1/4)
=13/12/(13/12)+(1/2+1/3+1/4)/(1/2+1/3+1/4)
=13/12/(13/12)+1
=1+1
=2。
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