3. Вычислите: 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 − 8/13 · 0,1625.

1. \((0{,}018+0{,}982):(8\cdot0{,}5-0{,}8)=1:3{,}2=0{,}3125\).
2. \(27{,}3\cdot5{,}1\cdot(-2{,}2):(-0{,}00019)=\frac{306306}{19}=1612247\frac{13}{19}\approx1612136{,}8421\).
3. \(\left(6\frac{8}{15}-4\frac{21}{45}\right)\cdot4{,}5-2\frac{1}{6}:0{,}52=\left(6\frac{8}{15}-4\frac{7}{15}\right)\cdot\frac{9}{2}-\frac{13}{6}:\frac{13}{25}=\frac{31}{15}\cdot\frac{9}{2}-\frac{25}{6}=\frac{77}{15}\).
4. \(\left(\frac{9}{22}+1\frac{12}{33}\right)\cdot1{,}32-\frac{8}{13}\cdot0{,}1625=\frac{39}{22}\cdot\frac{33}{25}-\frac{8}{13}\cdot\frac{13}{80}=\frac{56}{25}=2{,}24\).

Ответ: 1) 0,3125; 2) \(\frac{306306}{19}\approx1612136{,}8421\); 3) \(\frac{77}{15}\); 4) 2,24.