найти значение выражение - 0,65*4/13+1 2/3:5/9-3 4/15

- 0,65 * 4/13 + 1 2/3 : 5/9 - 3 4/15 =

= - 65/100 * 4/13 + (1 * 3 + 2) / 3 : 5/9 - (3 * 15 + 4) / 15 =

= - 13/20 * 4/13 + 5/3 : 5/9 - 49/15 =

= - (13 * 4) / (20 * 13) + (5 * 3) / (3 * 3) * 9/5 - 49/15 =

= - 4/20 + 15/9 * 9/5 - 49 / 15 =

= - 4/20 + (15 * 9) / (9 * 5) - 49 / 15 =

= - 1/5 + 15/5 - 49/15 =

= 14/5 - 49/15 =

= (14 * 3) / (5 * 3) - 49/15 =

= 42/15 - 49/15 = - 7/15.

Ответ: - 7/15.