Решите быстро)) можно просто ответы записать.

1) 12 3/8 + 8 1/6 = 12 9/24 + 8 4/24 = 20 13/24

2) 3 13/15 + 6 7/10 = 3 26/30 + 6 21/30 = 10 17/30

3) 9 8/21 + 4 11/14 = 9 16/42 + 33/42 = 14 7/42 = 14 1/6

4) 8 5/9 + 7 3/4 + 12 7/12 = 8 20/36 + 7 27/36 + 12 21/36 = 28 8/9

1) =12 9/24+8 4/24=20 13/24
2)=3 26/30 + 6 21/20= 10 17/30
3)=9 16/42 +33/42=14 7/42=14 1/6
4)——-