tolong bantu jawab, no 8,9, dan 10. makasih :)

8 a. 1/2 × 3/4 - 1/ 12
= 1/2 × 3/4 = 3/8
= 3/8 - 1/12 = 36/96 - 8/96
= 28/96 : 4/4
= 7/24
b. 1/5 + 1/2 × 1/10
= 1/2 × 1/10 = 1/20 + 1/5
= 1/20 + 4/20
= 5/20 : 5/5 = 1/4
c. 1/5 : ( 1/2 - 1/10)
1/2 - 1/10 = 5/10 - 1/10
= 4/10 : 1/5
= 4/2 : 2/2 = 2/1 = 2
d. 3/2 - 5% + 8,20
3/2 = 1/5
5% = 5/100 = 0,05
8,20 = 8,20
1,5 - 0,05 + 8,20 = 9,65
10. 2,5 - 3/4 - 1/2
= 25/10 - 3/4 - 1/2
= 50/20 - 15/20 - 10/20
= 25/20 : 5/5 = 5/4