1) 7/9 * -15/14 * 27/5 = - 9/2
2) 17/3 : 1/3 = 17
3) 19/12 * 6 = 19/2 = 9 1/2
5) 2/3 * 84/100 = 21/25
6) 2/3 * 54/25 = 36/25 = 1 11/25
7) - 9/2 - 17= - 4 1/2 - 17 = - 21 1/2
8) - 21 1/2 - 9 1/2 = - 31
9) - 31 - 14/25 = - 31 14/25
10) - 31 14/25 - 1 11/25 = - 33
ОТВЕТ: - 33