a) 3min → 3 × 60 = 180seg
b) 13Km → 13 × 10 × 10 × 10 = 130000m
c) 120m/s → 120 × 3,6 = 432Km/h
d) 380Km/h → 380 ÷ 3,6 = 105,5m/s
e) 100.000m → 100.000 ÷ 10 ÷ 10 ÷ 10 = 100Km
f) 2h → 2 × 60 = 120min
