Выполним указанные действия:
а) 485 979 + 691 ⋅ 308
- 691 × 308 = 213 828
- 485 979 + 213 828 = 699 807
б) 409 ⋅ 539 – 179 888
- 409 × 539 = 220 451
- 220 451 – 179 888 = 40 563
в) 15³ - 3³ ⋅ 5
- 15³ = 15 × 15 × 15 = 3375
- 3³ = 3 × 3 × 3 = 27
- 27 × 5 = 135
- 3375 – 135 = 3240
г) (10³ – 6³) : (2⁴ ⋅ 7²)
- 10³ = 10 × 10 × 10 = 1000
- 6³ = 6 × 6 × 6 = 216
- 1000 – 216 = 784
- 2⁴ = 2 × 2 × 2 × 2 = 16
- 7² = 7 × 7 = 49
- 16 × 49 = 784
- 784 : 784 = 1
Ответ: а) 699 807; б) 40 563; в) 3240; г) 1