Ответ:
1) 13/20
2) 4/20 +3/20 7/40 + 7/40
3) 10/20 - 3/20 20/40-6/40
4) 1/40 2/40 20/40 30/40
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Answers & Comments
Ответ:
1) 13/20
2) 4/20 +3/20 7/40 + 7/40
3) 10/20 - 3/20 20/40-6/40
4) 1/40 2/40 20/40 30/40