1.15 целых 7/11 минус 4 целых 9/16 плюс 3 целых 4/11
2.12 целых 4/13 минус 2 целых 13/20 плюс 3 целых 9/13
2.12 целых 4/13 минус 2 целых 13/20 плюс 3 целых 9/13
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1. 15 7/11 - 4 9/16 + 3 4/11 = 15 7/11 + 3 4/11 - 4 9/16 = 18 11/11- 4 9/16 = 19 - 4 9/16 = 18 16/16 - 4 9/16 = 14 7/162. 12 4/13 - 2 13/20 + 3 9/13 = 12 4/13 + 3 9/13- 2 13/20 = 15 13/13 - 2 13/20 = 16 - 2 13/20 = 15 20/20 - 2 13/20 = 13 7/20