a)
[tex] \frac{7}{2} {m}^{3} + 63 {dm}^{3} + 1500 {cm}^{3} [/tex]
m³=1000dm³
cm³=1/1000dm³
[tex]3500 {dm}^{3} + 63dm ^{3} + 1.5 {dm}^{3} [/tex]
[tex] = 3564.5dm ^{3} [/tex]
