Mohon bantuannya ya.... tolong beserta caranya ya...

515 - (-12 ) × 25 : 20
= 515 + 12 × 25 : 20
= 515 + ( 12 × 25 : 20 )
= 515 + 15
= 530

18 liter/menit=...cm³/detik
Q=V/t
=18 liter/1 menit
=18000 cm³/60 detik
=300 cm³/detik