посчитайте по математике 6 клас​

1) 5/7 + 5/14 = 10/14 + 5/14 = 15/14

2) 3/11 + 3/22 = 6/22 + 3/22 = 9/22

3) 7/27 + 14/81 = 21/81 + 14/81 = 35/81

4) 3/25 + 18/75 = 9/75 + 18/75 = 27/75

вроде так