1) (0,018 + 0,982) : (8 · 0,5 − 0,8); 2) 27,3 · 5,1 · (−2,2) : (−0,00019); 3) (6 8/15 − 4 21/45) · 4,5 − 2 1/6 : 0,52; 4) (9/22 + 1 12/33) · 1,32 − 8/19 · 0,1625.

1. \((0.018+0.982):(8\cdot0.5-0.8)=1:3.2=0.3125\).
2. \(27.3\cdot5.1\cdot(-2.2):(-0.00019)=\frac{306.306}{0.00019}=1\,612\,136.842105\ldots\).
3. \(\left(6\frac{8}{15}-4\frac{21}{45}\right)\cdot4.5-2\frac16:0.52=\left(6\frac{8}{15}-4\frac{7}{15}\right)\cdot\frac92-\frac{13}{6}:\frac{13}{25}=\frac{91}{15}\cdot\frac92-\frac{25}{6}=\frac{273}{10}-\frac{25}{6}=\frac{659}{30}=21\frac{29}{30}\).
4. \(\left(\frac9{22}+1\frac{12}{33}\right)\cdot1.32-\frac8{19}\cdot0.1625=\left(\frac9{22}+\frac{15}{11}\right)\cdot\frac{33}{25}-\frac8{19}\cdot\frac{13}{80}=\frac{39}{22}\cdot\frac{33}{25}-\frac{13}{190}=\frac{1521}{550}-\frac{13}{190}=\frac{14483}{5225}\).

Ответ: 1) 0,3125; 2) 1 612 136,842105…; 3) 21 29/30; 4) 14483/5225.