Question

quantos cm há em:
1/2 m?
2/5 m?

Answer 1

Usando regra de três.
1 m → 100 cm
1/2 m → x

x=100.1/2
x=50 cm.

1 m → 100 cm
2/5 → x
x=100.2/5
x=200/5
x= 40 cm

1 metro equivale a 100 cm.