Разберем каждый пример по порядку:
1. (570:3)
(570:3 = 190)
2. (910:7)
(910:7 = 130)
3. (6 - 130)
(6 - 130 = -124)
4. (4 - 240)
(4 - 240 = -236)
5. (3 - 170)
(3 - 170 = -167)
6. (840:2 + 580)
(840:2 = 420)
(420 + 580 = 1000)
7. (650:5 + 170)
(650:5 = 130)
(130 + 170 = 300)
8. (880:4 - 200)
(880:4 = 220)
(220 - 200 = 20)
Ответы:
1. (570:3 = 190)
2. (910:7 = 130)
3. (6 - 130 = -124)
4. (4 - 240 = -236)
5. (3 - 170 = -167)
6. (840:2 + 580 = 1000)
7. (650:5 + 170 = 300)
8. (880:4 - 200 = 20)