Lavenna murtoluvut samannimisiksi ja laske ne yhteen.

a. [[$\dfrac{1}{3}$]] + [[$\dfrac{1}{2}$]]
= ?) [[$\dfrac{1}{3}$]] + ?) [[$\dfrac{1}{2}$]]
= +
=

b. [[$\dfrac{1}{3}$]] + [[$\dfrac{3}{4}$]]
= ?) [[$\dfrac{1}{3}$]] + ?) [[$\dfrac{3}{4}$]]
= +
= = ? ?

c. [[$\dfrac{1}{5}$]] + [[$\dfrac{2}{3}$]]
= ?) [[$\dfrac{1}{5}$]] + ?) [[$\dfrac{2}{3}$]]
= +
=

d. [[$\dfrac{2}{3}$]] + [[$\dfrac{1}{2}$]]
= ?) [[$\dfrac{2}{3}$]] + ?) [[$\dfrac{1}{2}$]]
= +
= = ? ?