13. Jika q = 20, hitunglah q + 8.
Jawaban: 20 + 8 = 28
14. Jika r = 25, hitunglah r – 15.
Jawaban: 25 – 15 = 10
15. Jika s = 30, hitunglah s x 3.
Jawaban: 30 x 3 = 90
13. Jika q = 20, hitunglah q + 8.
Jawaban: 20 + 8 = 28
14. Jika r = 25, hitunglah r – 15.
Jawaban: 25 – 15 = 10
15. Jika s = 30, hitunglah s x 3.
Jawaban: 30 x 3 = 90