Răspuns :
0,(3) rad 7 (rad 7 - 3) =
= 3/9 rad 7 (rad 7 - 3) =
= 1/3 rad 7 (rad 7- 3) =
= 1/3 * 7 - 3/3 rad 7 =
= 7/3 - rad 7
= 3/9 rad 7 (rad 7 - 3) =
= 1/3 rad 7 (rad 7- 3) =
= 1/3 * 7 - 3/3 rad 7 =
= 7/3 - rad 7