同分母分数计算题带答案20道

2/3+1/3
3/5+1/5
4/4+3/4
12/65+44/65
32/99+77/99
2/9+7/9
2/11-2/11
43/109-31/109
10/10-3/10
32/11-2/11
2/5+3/5+1/5
5/17+3/17-2/17
3/10+3/10+3/10
11/88+22/88-33/88
13/16+11/16
13/16-11/16
12/21+7/21
33/22-22/22+1/22
7/9-2/9
1/3+1/3
4/37+70/37

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