Question

решите пж пример, срочно)​

Answer 1

Ответ:

-2. 5/7

Пошаговое объяснение:

1) 2 : 14/19 = 2 * 19/14 = 38/14 = 2. 10/14 = 2. 5/7

2) 2/9 - 3. 7/18 =

4/18 - 3. 7/18 = -3. 3/18 = -3. 1/6

3) 1. 5/7 * (-3. 1/6) =

12/7 * (-19/6) = 2/7 * (-19/1) = -38/7 = -5. 3/7

4) 2. 5/7 + (-5. 3/7) = 2. 5/7 - 5. 3/7 =

2. 5/7 - 4. 10/7 =

-2. 5/7

Answer 2

Пошаговое объяснение:

2:14/19+1 5/7×(2/9-3 7/18)=

=2×19/14+12/7×(2/9-61/18)=

=19/7+12/7×(((4-61)/18)=

=19/7+12/7×(-57/18)=

=19/7-114/21=(57-114)/21= - 57/21=

= -19/7= - 2 5/7