1/2+1/4=.3/4-2/5=.7/8十2/3=.1-3/12 =.1/3

问题描述:

1/2+1/4=.3/4-2/5=.7/8十2/3=.1-3/12 =.1/3
1/2+1/4=.3/4-2/5=.
7/8十2/3=.1-3/12 =.
1/3+2/7=.3/5-1/10=.
5/7-6/15=.

3/4~7/20~5/24~9/12~13/21~1/2~29/105不对,最后一个33/105