tolong di jawab pakai jalan

1. (1 1/2 = 3/2 )+ 2/3 +3/4
= 18/12 + 8/12 + 9/12
= 35/12

2. (2 1/2 = 5/2) + (2 1/4 = 9/4 ) + 3/5
= 50/20 + 45/20 + 12/20
= 107/20

3. ( 3 1/4 = 13/4 ) + (2 1/2 = 5/2) + 5/6
= 39/12 + 30/12 + 10/12
= 79/12