Найди значения выражений. 1) 1 000 000 − (3 526 + 19 678 + 418 947) − 557 848; 2) (39 844 : 7 + 20 864 : 8) · 20 − 6 987 · 9; 3) 6 · (123 115 : 5 − 22 757 : 7) : 8 + 7 981.

1)

\(3\,526 + 19\,678 + 418\,947 = 442\,151\).

\(1\,000\,000 - 442\,151 - 557\,848 = 557\,849 - 557\,848 = 1\).

2)

\(39\,844 : 7 = 5\,692\), \(20\,864 : 8 = 2\,608\).

\((5\,692 + 2\,608) \cdot 20 - 6\,987 \cdot 9 = 8\,300 \cdot 20 - 62\,883 = 166\,000 - 62\,883 = 103\,117\).

3)

\(123\,115 : 5 = 24\,623\), \(22\,757 : 7 = 3\,251\).

\(6 \cdot (24\,623 - 3\,251) : 8 + 7\,981 = 6 \cdot 21\,372 : 8 + 7\,981 = 128\,232 : 8 + 7\,981 = 16\,029 + 7\,981 = 24\,010\).

Ответ: 1) 1; 2) 103 117; 3) 24 010.