а) 15/16 - 3/4 = 15/16 - 12/16 = 3/16
б) 1 3/7 - 2/3 = 7/7 + 3/7 - 14/21 = 10/7 - 14/21 = 30/21 - 14/21 = 16/21
в) 1 1/8 + (-1.15) = 8/8 + 1/8 - 1.15 = 9/8 - 1.15 = 9/8 - 1.15 = 1.125 - 1.15 = -0.025
а) 15/16 - 3/4 = 15/16 - 12/16 = 3/16
б) 1 3/7 - 2/3 = 7/7 + 3/7 - 14/21 = 10/7 - 14/21 = 30/21 - 14/21 = 16/21
в) 1 1/8 + (-1.15) = 8/8 + 1/8 - 1.15 = 9/8 - 1.15 = 9/8 - 1.15 = 1.125 - 1.15 = -0.025