注：/前面的为分子,后面的为分母,如1/2是二分之一
5/6-2/9=11/182/3+3/5=19/156/7-1/2=5/14
2/3-3/5=1/156/7+1/2=19/142/3+1/6=5/6
1/5+1/7=12/351/4+1/9=13/361/3+1/4=7/121/4-1/9=5/361/3-1/4=1/12 1-2/5=3/5
11/12-2/3=1/43/10+2/5=7/103/4+5/12=7/6
5/4-5/12=5/611/62/9=29/181/5-1/9=4/45
1-6/7=1/73/5-3/7=6/351/31/8=5/24
1/5+1/9=14/457/4+1/7=53/284/3+3/2=17/6
1-1/9=8/92/3-2/7=8/211-1/4-2/5=7/20
5/6+1/2=4/34/3-3/4=7/121-4/7=3/7
5/9+18/5=5/64/7+1/6-4/7=1/62-7/9-2/9=1
3/8+7/10+5/8=17/107/8-(1/8+3/4)=03/5+7/8+2/5=15/8 7/9-(1/9+1/3)=1/35/6-3/10+1/6-7/10=01-2/5=3/5
1/4+(2/5+3/4)=7/53/4+1/6-2/3=1/42/3+1/6+1/12=11/12 1-1/3+2/7=20/211/2+4/5-3/10=15/6-(2/3-1/9)=5/18
