tolong jwb nomor 9,10,11,12,13 dong ??

9. berat badan ayah = 60 : 0,75
                                 = 80 kg

0,25 dari BB ayah= 80 x 25/100
                             = a. 20 kg
10. 38/6 - 29/8
= 152/24 - 87/24
=65/24
= b. 2 17/24

11. dikali 10 = c. 128,8 : 23
12. 17/5 : 5/4 = 68/25 = c. 2 18/25
13. a. dikali 1000