Aplicar suma de fracciones

- 7 / 4 + 1 / 4 + 1 = ____________________


- 1 / 6 + 5 / 6 = ____________________


- 1 / 4 + 1 / 4 + 1 / 4 + 1 / 4 + 4 / 4 + 2 = ____________________


- 1 / 2 + 1 / 2 + 1 / 4 + 3 / 4 = ____________________