100道，同分母异分母各50，满意请采纳：
本人现出的题目，每道题目都有在心里验算，如有雷同纯属数学文化的美好相遇，不存在抄袭哈。
3/7-2/7=
5/8-3/8=
2/5-1/5=
5/8-1/8=
3/5+2/5=
1/7+2/7=
2/8+5/8=
1/9+4/9=
5/9+2/9=
7/9-2/9=
7/15-2/15=
1/16+3/16=
2/13+1/13=
5/17+1/17=
7/15+2/15=
1/18+7/18=
5/16+7/16=
1/17+2/17=
2/21+5/21=
7/18-1/18=
5/12+1/12=
5/14-3/14=
4/15-1/15=
3/14+9/14=
3/22+5/22=
11/25+4/25=
9/14-3/14=
15/24-7/24=
10/27-7/27=
11/15-2/15=
13/25+2/25=
1/11+3/11=
17/32-9/32=
17/18-5/18=
13/27+14/27=
17/40+13/40=
5/28+3/28=
11/35-4/35=
14/33+8/33=
5/24+7/24=
11/36-7/36=
4/15+2/15=
7/22-3/22=
17/20-7/20=
9/28-3/28=
19/21-4/21=
7/15-2/15=
13/18-5/18=
20/33-5/33=
7/24-2/24=
再送你50个同分母的。
3/5-2/7=
5/6-3/8=
2/3-1/5=
5/7-1/8=
3/4+2/5=
1/5+2/7=
5/6+5/8=
1/3+2/5=
5/9+3/8=
7/8-2/9=
2/5-2/7=
1/6+3/8=
2/3+1/5=
5/7+1/8=
3/7+2/5=
1/8+2/7=
5/6+5/9=
1/7+2/5=
2/3+3/10=
7/9-1/6=
5/12-2/9=
5/14-1/7=
4/15-1/3=
5/14+1/7=
3/8+3/5=
1/5+2/7=
9/14-3/7=
7/8-3/4=
10/27-3/9=
11/15-2/5=
8/25-1/5=
1/16+3/8=
2/3-1/9=
5/9-5/18=
4/27-1/9=
2/21+2/7=
5/16+3/8=
9/20-1/5=
2/33+3/11=
2/6+7/24=
11/36-2/9=
4/15+2/5=
2/11-3/22=
5/20-7/10=
1/7-3/28=
2/7-2/21=
3/8-5/16=
1/5-3/20=
20/33-3/11=
7/24-2/6=