- \(\frac58\cdot\frac13+\frac38:3=\frac5{24}+\frac18=\frac13\).
- \(\frac{11}{17}:9-\frac2{11}\cdot\frac19=\frac{11}{153}-\frac2{99}=\frac{17}{561}\).
- \(\frac67\cdot\frac14-\frac27:4=\frac3{14}-\frac1{14}=\frac17\).
- \(\frac{17}{19}:5+\frac2{19}\cdot\frac15=\frac{17}{95}+\frac2{95}=\frac15\).
- \(79\cdot11-69:\frac1{11}=869-759=110\).
- \(87:\frac1{15}+13\cdot15=1305+195=1500\).
- \(\frac78\cdot10+\frac18:0.1=\frac{35}{4}+\frac54=10\).
- \(\frac5{12}:0.2+\frac7{12}\cdot5=\frac{25}{12}+\frac{35}{12}=5\).
- \(19\cdot\frac5{17}+81:3\frac25=\frac{95}{17}+\frac{135}{17}=\frac{230}{17}=13\frac9{17}\).
- \(57:\frac9{11}+33\cdot1\frac29=\frac{209}{3}+\frac{119}{3}=109\).
- \(\frac78\cdot9+\frac58:\frac19-\frac12\cdot9=\frac{63}{8}+\frac{45}{8}-\frac{36}{8}=9\).
- \(\frac79:9+\frac59\cdot\frac19-\frac13\cdot\frac19=\frac7{81}+\frac5{81}-\frac3{81}=\frac19\).
- \(\frac2{43}\cdot\frac16+\frac2{43}\cdot1\frac38+\frac{41}{43}:\frac{24}{37}=\frac1{129}+\frac1{16}+\frac{1517}{1032}=\frac32\).
- \(\frac5{63}\cdot2\frac3{14}+\frac5{63}\cdot\frac2{21}+\frac{58}{63}:\frac{42}{97}=\frac{85}{441}+\frac{10}{1323}+\frac{2813}{1323}=\frac{16}{7}\).
- \(\frac{87\cdot35-81\cdot35}{37\cdot28-28^2}=\frac{6\cdot35}{28(37-28)}=\frac{210}{252}=\frac56\).
Ответ: А) 1/3; Б) 17/561; В) 1/7; Г) 1/5; Д) 110; Е) 1500; Ё) 10; З) 5; И) 13 9/17; Й) 109; К) 9; Л) 1/9; М) 3/2; Н) 16/7; О) 5/6.