а) 2+5/8-2-5/8 = 2 + 0.625 - 2 - 0.625 = 0
б) 3/4 + 1 - 3/4 - 1 - 3/4 + 1 + 3/4 - 1 = 0
в) 1 + 3/7 - 1 - 3/7 - 1 + 3/7 = 0
г) 4 + 2/9 - 4 + 2/9 - 4 = 4 + 0.222 - 4 + 0.222 - 4 = 0.444
а) 2+5/8-2-5/8 = 2 + 0.625 - 2 - 0.625 = 0
б) 3/4 + 1 - 3/4 - 1 - 3/4 + 1 + 3/4 - 1 = 0
в) 1 + 3/7 - 1 - 3/7 - 1 + 3/7 = 0
г) 4 + 2/9 - 4 + 2/9 - 4 = 4 + 0.222 - 4 + 0.222 - 4 = 0.444