tolong pakai cara plisss

9.
3/12+ 3 9/15
3/12 + 54/15
15/60+ 216/60= 231/60=77/20= 3 17/20

10.
4/8 x 2 5/10 : 0.2
4/8 x 25/10 x 10/2
1/2 x 5/2 x 5
25/4=6 1/4