1) 2/5 + 1/3 a) 6/15 b) 5/15 c) 11/15 d) 1/15 2) 23/6 - 14/5 a) 5/6 b) 31/30 c) 5/31 d) 6/38 3) 2/7 ×3/7 a) 6/49 b) 5/14 c) 1/7 d) 2/49

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