tolong dijawab ya kakak kakak

18. = 70 cm³ + 30 ml + 40 cc
= 70 cc + 30 cc + 40 cc = 140 cc
19. = 24 cc - 20 ml + 1 cm³
= 24 cm³ - 20 cm³ + 1 cm³ = 5 cm³
20. = 18 ml + 20 cc - 28 cm³
= 18 ml + 20 ml + 28 ml = 10 ml