(3 17/36-6 7/12)*2,5-1/4:0,65

3 17/36- 6 7/12= 3-6+ 17/36-7/12=-3 + (-4/36)=-3 1/9
- 3 1/9 * 2.5= -28/9 * 5/2= -70/9
-1/4:0.65=-1/4*20/13=-20/52
-70/9-20/52= -3820/468

(3 17/36 - 6 7/12) × 2,5 - 1/4 : 0,65 =
1) 3 17/36 - 6 7/12 = 3 17/36 - 6 14/36 = - 2 11/12
2) - 2 11/12 × 2,5 = - 35/12 × 25/10 = - 7 7/24
3) 1/4 : 0,65 = 1/4 × 100/65 = 1/1 × 25/65 = 25/65 = 5/13
4) -7 7/24 - 5/13 = - 7 29/312.