Допоможть будь ласка

Ответ:

- 7/9

- 19,08

Пошаговое разъяснение:

- 8 4/7 - (- 6 3/5) - (- 9 2/9) - 1,6 - 6 3/7 = - 8 4/7 + 6 3/5 + 9 2/9 - 1,6 - 6 3/7 = - 7/9

1) - 8 4/7 + 6 3/5 = 6 3/5 - 8 4/7 = 33/5 - 60/7 = 231/35 - 300/35 = - 69/35 = - 1 34/35

2) - 1 34/35 + 9 2/9 = 9 2/9 - 1 34/35 = 9 70/315 - 1 306/315 =8 385/315 - 1 306/315 = 7 79/315

3) 7 79/315 - 1,6 = 7 79/315 - 1 6/10 = 7 79/315 - 1 3/5 = 7 79/315 - 1 189/315 = 6 394/315 - 1 189/315 = 5 205/315 = 5 41/63

5) 5 41/63 - 6 3/7 = 356/63 - 45/7 = 356/63 - 405/63 = - 49/63 = - 7/9

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- 17,6 - (- 3,9) - (- 8,4) - 9,6 - 4,18 = - 17,6 + 3,9 + 8,4 - 9,6 - 4,18 = - 19,08