3.Compune numerele:
3 x 10 000 + 8 x 100 + 4 x 10+2=
7 x 100 000 + 5 x 10 000 + 2 x 1 000 + 1x 100 + 4 x 10 + 5 =
6 x 100 000 + 2 x 10 000 + 9 x 1 000 + 7 x 100 =
4 x 100 000 + 7 x 1000 + 5 x 10 + 8 =​