Ответ:
5-3/11=4 7/11
6-2/13=5 11/13
9-15/23=8 8/23
12-1/9=11 8/9
23-31/52=22 21/52
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Ответ:
5-3/11=4 7/11
6-2/13=5 11/13
9-15/23=8 8/23
12-1/9=11 8/9
23-31/52=22 21/52