25: 5+65: 5. 72: 6-36: 6 49: 7+84: 7. 60: 15+60: 20. 80: 4-64: 16. 85: 17+90: 45. (27+13)*2: 8. (64-16): 12*15. 13*6: (32-29)

1) 25:5+65:5 = 5+13=18
2) 72:6-36:6 = 12-6= 6
3) 49:7+84:7 = 7+12= 19
4) 60:15+60:20 = 4+3= 7
5) 80:4-64:16 = 20-4= 16
6) 85:17+90:45 = 5+2= 7
7) (27+13)*2:8 = 40*2:8=80:8=10
8) (64-16):12*15 = 48:12*15=4*15=60
9) 13*6:(32-29) = 78:3 = 26