Ответ:
а) \((-15.64 : 4\frac{3}{5}+7.1)\cdot2\frac{1}{5}=(-3.4+7.1)\cdot2.2=3.7\cdot2.2=8.14\).
Ответ: \(8.14\).
б) \((0.4-\frac{11}{15})\cdot\frac{10}{7}-(\frac{7}{10}-0.5):\frac{7}{6}=(-\frac{1}{3})\cdot\frac{10}{7}-\frac{1}{5}\cdot\frac{6}{7}=-\frac{10}{21}-\frac{6}{35}=-\frac{68}{105}\).
Ответ: \(-\frac{68}{105}\).
в) \(0.8:\left((\frac{2}{3})^2+\frac{5}{9}\right)=\frac45:\frac{9}{9}=\frac45=0.8\).
Ответ: \(0.8\).
г) \(\frac{37.12-5.6\cdot0.14}{1.2+3.4+0.35}=\frac{37.12-0.784}{4.95}=\frac{36.336}{4.95}=7.34\frac{2}{3}\).
Ответ: \(7.34\frac{2}{3}\).
д) \((2.17\cdot3.7-1.83\cdot2.3):19.1=(8.029-4.209):19.1=3.82:19.1=0.2\).
Ответ: \(0.2\).
е) \(5\frac4{19}\cdot3\frac47+1\frac{35}{49}:\frac7{25}-1\frac23=\frac{99}{19}\cdot\frac{25}{7}+\frac{84}{49}\cdot\frac{25}{7}-\frac53=\frac{2475}{133}+\frac{300}{49}-\frac53=\frac{25510}{1029}\).
Ответ: \(\frac{25510}{1029}\).
ё) \(\frac{(3\frac13-2\frac23)\cdot2.4}{(15.5+4.5):2\frac12}\cdot5\frac37-(2\frac12+1\frac13):\frac16\).
\(3\frac13-2\frac23=\frac23\), числитель равен \(1.6\), знаменатель равен \(20:2.5=8\). Тогда \(\frac{1.6}{8}\cdot\frac{38}{7}-\frac{23}{6}\cdot6=\frac17\cdot\frac{38}{7}-23=\frac{38}{49}-23=-\frac{1089}{49}\).
Ответ: \(-\frac{1089}{49}\).
э) \((2\frac7{15}+1\frac7{12})\cdot\frac19-1\frac78=(\frac{37}{15}+\frac{19}{12})\cdot\frac19-\frac{15}{8}=\frac{193}{180}-\frac{270}{180}=-\frac{77}{180}\).
Ответ: \(-\frac{77}{180}\).
и) \((6\frac17-5\frac34):\frac{11}{14}+(3\frac34-1\frac56):\frac16=\frac{17}{28}\cdot\frac{14}{11}+\frac{23}{12}\cdot6=\frac{17}{22}+\frac{23}{2}=\frac{135}{11}\).
Ответ: \(\frac{135}{11}\).
