3/5 + 2/10 =, 4/5, 3/10, 1/5, 4/20, 1/5 + 7/15 =, 6/17, 3/4, 2/3, 1/17, 2/7 + 1/2 =, 2/11, 3/7, 1/7, 11/14, 3/4 - 2/5 =, 7/20, 5/8, 2/3, 1/5, 3/7 - 1/4 =, 5/6, 3/17, 5/28, 3/7, 11/15 × 3/4 =, 2/7, 11/20, 33/10, 1/5, 3/7 × 14/21 =, 4/8, 3/7, 1/8, 2/7, 5/14 ÷ 1/2 =, 4/14, 3/8, 1/7, 5/7, 1/9 ÷ 2/7 =, 7/18, 2/15, 3/16, 4/11, 3/10 ÷ 9/15 =, 1, 8, 4, 3

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