Помогите
1. 6 5/6 +2 3/ 4
2. 4 5/14+(5 1/12- 3 4/21)
дріб обчиислити

1) 6 5/6 + 2 3/4 = 6 10/12 + 2 9/12 = 8 19/12 = 9 7/12
2) 4 5/14 + (5 1/12 - 3 4/21) = 4 30/84 + (5 7/84 - 3 16/84) = 4 30/84 + 1 75/84 = 5 105/84 = 6 21/84 = 6.25