а) 1/4+2/3 = 3/12 + 8/12 = 11/12
б) 11/14-1/7 = 11/14 - 2/14 = 9/14
в) 3/3 -7/16 = 16/16 - 7/16 = 9/16 (3/3 = 1 = 16/16)
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а) 1/4+2/3 = 3/12 + 8/12 = 11/12
б) 11/14-1/7 = 11/14 - 2/14 = 9/14
в) 3/3 -7/16 = 16/16 - 7/16 = 9/16 (3/3 = 1 = 16/16)