Ответ:
4/5+1/15=13/15
4/7+2/3=1 5/21
3/5+1/12=41/60
1 6/7+9/21=2 2/7
6 3/10+1 2/5=7 7/10
7/15+21=21 7/15
8/9-11/18=5/18
13/16-5/12=11/48
3/21-2/14=0
6/13-2/39=16/39
39 8/8-7/8=39 1/8
1 6/6-2=0
3 18/20+7/25+1 3/4=5 93/100
6/7+41-5/77=41 61/77
12 1/2+4 1/18-3/3=15 5/9.
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Ответ:
4/5+1/15=13/15
4/7+2/3=1 5/21
3/5+1/12=41/60
1 6/7+9/21=2 2/7
6 3/10+1 2/5=7 7/10
7/15+21=21 7/15
8/9-11/18=5/18
13/16-5/12=11/48
3/21-2/14=0
6/13-2/39=16/39
39 8/8-7/8=39 1/8
1 6/6-2=0
3 18/20+7/25+1 3/4=5 93/100
6/7+41-5/77=41 61/77
12 1/2+4 1/18-3/3=15 5/9.