Verified answer

Відповідь: Решение на фотографии

Ответ:

Пошаговое объяснение:

1) -3/16 + (-2. 5/16) = -3/16 - 2. 5/16 =

-2. 8/16 = -2. 1/2

2) -3/7 + (-5/6) = -3/7 - 5/6 = -18/42 - 35/42 = -53/42 = -1. 11/42

3) -3. 7/9 + (-2. 5/9) = -3. 7/9 - 2. 5/9 = -5. 12/9 = -6. 3/9 = -6. 1/3

4) -5/12 + (-2/15) = -5/12 - 2/15 = -25/60 - 8/60 = -33/60 = -11/20

3) -1 + 1,138 = 0,138

6) 5/18 + (-7/24) = 5/18 - 7/24 = 20/72 - 21/72 = -1/72

9) -17/18 + 13/24 = -68/72 + 39/72 = 29/72

4. 2/9 - 5. 1/18 + 1. 5/6 - 2/3 =

4. 4/18 - 5. 1/18 + 1. 15/18 - 12/18 =

4. 4/18 - 4. 19/18 + 1. 15/18 - 12/18 =

-15/18 + 1. 15/18 - 12/18 =

1 - 12/18 = 18/18 - 12/18 = 6/18 = 1/3

7,8 - 9. 1/4 - 4. 7/10 + 3,4 =

(7,8 + 3,4) - 9. 1/4 - 4. 7/10 =

11,2 - 9. 5/20 - 4. 14/20 =

11,2 - 13. 19/20 =

11. 2/10 - 13. 19/20 =

11. 4/20 - 13. 19/20 = -2. 15/20 = -2. 3/4 или -2,75