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2. 4 2/5 + 0,15 = 4,4 + 0,15 = 4,55
3. 9,25 - 5 1/12 = 111/12 - 61/12 = 50/12 = 4 1/6
4. 14 4/7 - 2,75 = 102/7 - 11/4 = 408/28 - 77/28 = 331/28 = 11 23/28
5. 7 1/3 + 3 3/5 - 5,3 = 22/3 + 18/5 + 53/10 = 220/30 + 108/30 - 159/30 = 169/30 = 5 19/30
6. 6 1/3 - 2,75 + 9 7/12 = 19/3 - 11/4 + 115/12 = 76/12 - 33/12 + 115/12 = 158/12 = 13 1/6