57 Найди значения выражений:

Решение:

а) (729 ⋅ 8 + 729 ⋅ 492) : 90 ⋅ (520800 : 400 - 498)

1. \( 729 \cdot 8 = 5832 \)
2. \( 729 \cdot 492 = 358668 \)
3. \( 5832 + 358668 = 364500 \)
4. \( 520800 : 400 = 1302 \)
5. \( 1302 - 498 = 804 \)
6. \( 364500 : 90 = 4050 \)
7. \( 4050 \cdot 804 = 3256200 \)

б) 405 ⋅ (803 - 597) : 6 + 876000 : (3104 - 72 ⋅ 38 + 432)

1. \( 803 - 597 = 206 \)
2. \( 405 \cdot 206 = 83430 \)
3. \( 83430 : 6 = 13905 \)
4. \( 72 \cdot 38 = 2736 \)
5. \( 3104 - 2736 = 368 \)
6. \( 368 + 432 = 800 \)
7. \( 876000 : 800 = 1095 \)
8. \( 13905 + 1095 = 15000 \)

Ответ: а) 3256200; б) 15000.