1) 1 5/35 + 21/35 - 31/35 = 61/35 - 31/35 = 30/35 = 6/7
2) 35/30 + 12/30 - 27/30 = (47-27)/30 = 20/30 = 2/3
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1) 1 5/35 + 21/35 - 31/35 = 61/35 - 31/35 = 30/35 = 6/7
2) 35/30 + 12/30 - 27/30 = (47-27)/30 = 20/30 = 2/3