Resposta :
Resposta:
a. 1h ---3600s
o,5 = 3600/2 = 1.800s
b. 1m --- 100cm
x ------ 20cm
100x = 20
x = 20/100 = 0,2m
c. 2h = 2 . 3600 = 7.200s
d. 5kg = 5.000g
e. 3,5h = 2 . 3.600 + 1800 = 7200 + 1800 = 9.000s
f. 1,5kg = 1.500g
g. 1,4h = 3600 + 1440 = 5.040s
h. 450,0g = 0,450kg
Bons estudos!