5 - (7/9 - 1/6) : 2,5 = ?
1) 7/9 - 1/6 = 14/18 - 3/18 = 11/18
2) 11/18 : 2,5 = 11/18 : 2 1/2 = 11/18 : 5/2 = 11/18 × 2/5 = 11/45
3) 5 - 11/45 = 225/45 - 11/45 = 214/45 = 4 34/45
ответ: 4 34/45
5 - (7/9 - 1/6) : 2,5 = ?
1) 7/9 - 1/6 = 14/18 - 3/18 = 11/18
2) 11/18 : 2,5 = 11/18 : 2 1/2 = 11/18 : 5/2 = 11/18 × 2/5 = 11/45
3) 5 - 11/45 = 225/45 - 11/45 = 214/45 = 4 34/45
ответ: 4 34/45