6. Найдите значения выражений: 30 + 18 − 21; 80 − 56 + 16; 92 − 72 + 26; 43 + 17 + 40; 100 − 24 + 6; 38 + 30 − 16; 34 + 36 − 19; 90 − 73 + 18.

1. \(30 + 18 - 21 = 48 - 21 = 27\)
2. \(80 - 56 + 16 = 24 + 16 = 40\)
3. \(92 - 72 + 26 = 20 + 26 = 46\)
4. \(43 + 17 + 40 = 60 + 40 = 100\)
5. \(100 - 24 + 6 = 76 + 6 = 82\)
6. \(38 + 30 - 16 = 68 - 16 = 52\)
7. \(34 + 36 - 19 = 70 - 19 = 51\)
8. \(90 - 73 + 18 = 17 + 18 = 35\)

Ответ: 27; 40; 46; 100; 82; 52; 51; 35.