minta tolong bantuannya lah besok dikumpul

7.
1/4 + 2/6 = 3/12 + 4/12 = 7/12

8.
4/6 + 7/8 = 16/24 + 21/24 = 37/24 = 1 13/24

9.

1 5/8 + 3 2/9 = 13/8 + 29/9 = 117/72 + 232/72 = 349/72 = 4 61/72

10.
1/4 + 3 1/2 + 5 = 1/4 + 7/2 + 5/1 = 1/4 +14/4 + 20/4 = 35/4 = 8 3/4

11.
7/9 - 1/12 = 28/36 - 3/36 = 25/36

12. 2 2/9 - 1 1/27 = 20/9 - 28/27 = 60/27 - 28/27 = 32/27 = 1 5/27