Question

Допоможіть зробити завдання номер 5

Answer 1

$1)$

$14 \frac{7}{15} -3 \frac{3}{23} \times \frac{23}{27} - 1 \frac{1}{5} \times \frac{1}{6} = \frac{217}{15} - \frac{72}{23} \times \frac{23}{27} - \frac{6}{5} \times \frac{1}{6} = \frac{217}{15} - \frac{72}{27} - \frac{1}{5} = \frac{1953 - 360 - 27}{135} = \frac{1566}{135} = 11.6$

$2 )$

$(5 \frac{8}{9} \div 1 \frac{17}{36} + 1 \frac{1}{4} ) \times \frac{5}{21} =( \frac{53}{9} \div \frac{53}{36} + \frac{5}{4} ) \times \frac{5}{21} = ( \frac{53}{9} \times \frac{36}{53} + \frac{5}{4} ) \times \frac{5}{21} = (4 + \frac{5}{4} ) \times \frac{5}{21} = 4 \frac{5}{4} \times \frac{5}{21} = \frac{21}{5} \times \frac{5}{21} = 1$

$3)$

$( - 3.25 - 2.75) \div ( - 0.6) + 0.8 \times ( - 7) = 6 \div ( - 0.6) + ( - 5.6) = - 10 - 5.6 = - 15.6$

$4)$

$( - 1 \frac{3}{8} - 2 \frac{5}{12} ) \div 5 \frac{5}{12} = ( - \frac{11}{8} - \frac{29}{12} ) \div \frac{65}{12} = - \frac{33 + 58}{24} \times \frac{12}{65} = - \frac{91}{24} \times \frac{12}{65} = - \frac{91}{130}$