Bonjour !
[tex]1 mm {}^{3} = 0,001 cm {}^{3} [/tex]
a)
[tex]225 mm {}^{3} = 225 \times 0,001 cm {}^{3}
= 0.225cm {}^{3} [/tex]
b)
[tex]1850 {mm}^{3} = 1850 \times 0.001 = 1.85 {cm}^{3} [/tex]
c)
[tex]45.5 {mm}^{3} = 45.5 \times 0.001 = 0.0455 {cm}^{3} [/tex]
Bonne journée