tolong pliss pake cara

1. 1 2/5 +2/7 =7/5 + 2/7=9/12

2. 4 1/3 +2 1/2= 13/3 + 5/2 =18/5

3. 2 3/4 + 1 4/5= 11/4 + 9/5 =20/9

4. 7 5/9 + 1 2/6= 68/9 + 8/6= 76/15

1.7/5 + 2/7 = 49/35 + 10/35= 59/35= 1 24/35
2.13/3 + 5/2= 26/6 + 15/6= 41/6= 6 5/6
3.11/4 + 9/5= 55/20 + 36/20= 91/20= 4 11/20
4.68/9 + 8/6= 136/18 + 24/18= 160/18= 8 16/18= 8 8/9
maaf kalo salah