Найдите суммы 3/4+1; -3/4-1; 3/4+1; 3/4-1

3/4 + 1 = 3/4 + 4/4 = 7/4- 3/4 - 1 = - 3/4 - 4/4 = - 7/43/4 + 1 = 3/4 + 4/4 = 7/43/4 - 1 = 3/4 - 4/4 = - 1/4