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№658
б) 7/4 = 28/16 = 84/48 = 168/96
№659
б) 1/4 = 3/12 = 4/16 = 5/20 = 7/28 = 15/60
г) 5/6 = 10/12 = 25/30 = 30/36 = 50/60 = 55/66
№661
б) 2/7 = 4/14 = 6/21 = 10/35 = 40/140
б) 7/4 = 28/16 = 84/48 = 168/96
№659
б) 1/4 = 3/12 = 4/16 = 5/20 = 7/28 = 15/60
г) 5/6 = 10/12 = 25/30 = 30/36 = 50/60 = 55/66
№661
б) 2/7 = 4/14 = 6/21 = 10/35 = 40/140
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