tolong jawab kan no 7 sampai 15

7.)
48/10 : 40/15
24/5 × 15/40
24/5 × 3/8
3/5 × 3
9/5
1 4/5 (a)

8.)
9/2 - 30/12 : (10/4 + 5/4)
9/2 - 30/12 : 15/4
9/2 - 30/12 × 4/15
9/2 - 2/3
27/6 - 4/6
23/6
3 5/6 (b)

9.)
81,86 (c)

10.)
96,432 (b)

11.)
640 (a)

12.)
17/4 + 16/5
85/20 + 64/20
149/20
7 9/20 (b)

13.)
22,64 (c)

14.)
27/56 (a)

15.)
3 5/9 (a)