Ex 9 dau coroana! Ajutor repede va rog

[tex]\it a)\ \ 345\\ \\ b)\ \ 716\\ \\ c)\ \ 43017\\ \\ d)\ \ \overline{a000aa}[/tex]
a ) = 300 + 40 + 5 = 345
b) = 700 + 10 + 6 = 716
c) = 40000 + 3000 + 10 + 7 = 43017
d) = a000aa