Tolong dijawab nomor 8 - 12

8.pak sukron = 90 × 2 = 180 m
pak jagornal = 32 × 10 = 320 m
9.30:7 =4,2 m×2 = 8,4
10.70:5 = 14 pohon
12.20×9=180=220-180 =40:4.5=8,8×2=16,16