tolong ya kakak kakak

7. (2 1/2 - 3/4) : 3
= (5/2 - 3/4) × 1/3
= (10/4 - 3/4) × 1/3
= 7/4 × 1/3
= 7/12

8. = 5/65 × 156
= 12 liter

9 28200/12 × 5
= 141000/12
= 11.750