а) 2 + 5/8 - 2 - 5/8 - 2 + 5/8 = 0
б) 3/4 + 1 - 3/4 - 1 - 3/4 + 1 = -3/4
в) 1 + 3/7 - 1 - 3/7 - 1 + 3/7 = 0
г) 4 + 2/9 - 4 + 2/9 - 4 - 2/9 - 2/9 + 4 = 0
а) 2 + 5/8 - 2 - 5/8 - 2 + 5/8 = 0
б) 3/4 + 1 - 3/4 - 1 - 3/4 + 1 = -3/4
в) 1 + 3/7 - 1 - 3/7 - 1 + 3/7 = 0
г) 4 + 2/9 - 4 + 2/9 - 4 - 2/9 - 2/9 + 4 = 0