1) \( 25 : 6 \)
\( 25 = 6 \times 4 + 1 \)
\( 25 : 6 = 4 \) (ост. \( 1 \))
2) \( 489 : 8 \)
\( 489 = 8 \times 61 + 1 \)
\( 489 : 8 = 61 \) (ост. \( 1 \))
3) \( 500 : 7 \)
\( 500 = 7 \times 71 + 3 \)
\( 500 : 7 = 71 \) (ост. \( 3 \))
Ответ: 4 (ост. 1), 61 (ост. 1), 71 (ост. 3).