Răspuns :
1890 + 1900 + 3000 + 7000 + 9999 =
3790 + 3000 + 7000 + 9999 =
6790 + 7000 + 9999 =
13790 + 9999 =
23 789
3790 + 3000 + 7000 + 9999 =
6790 + 7000 + 9999 =
13790 + 9999 =
23 789