tolong isiin yaaaa smuanyaaaa

8/12 + 2/12 =8+2 =10/12 =5/6
35/85 + 20/85 = 35+20 =55/85 = 11/17
8/12 + 2/12 =8-2=5/12
35/85 - 20/85 =35-20=15/85=3/17
maaf klo slh