Question

Напишіть будь ласка срочно

Answer 1

Ответ:

$( - \frac{5}{6} + 1 \frac{3}{5} ) \times ( - \frac{4}{5} - 1.2) = ( - \frac{25}{30} + \frac{48}{30} ) \times ( - \frac{4}{5} - \frac {6}{5} ) = \frac{23}{30} \times ( - 2) = - \frac{23}{15} = - 1 \frac{8}{15}$

$( - \frac{3}{4} - 0.25) \times \frac{3}{4} \times 1 \frac{3}{4} + \frac{2}{15} = - 1 \times \frac{3 \times 7}{4 \times 4} + \frac{2}{15} = - \frac{21}{16} + \frac{2}{15} = - 1 \frac{5}{16} + \frac{2}{15} = - 1 \frac{75}{240} + \frac{32}{240} = - 1 \frac{43}{240}$

$- 19 \frac{1}{2} \div ( - 4 \frac{2}{5} - 78.52 \div 5.2) = - 19 .5 \div ( - 4.4 - \frac{7852 \times 10}{100 \times 52} ) = - 19.5 \div ( - 4.4 - \frac{151}{10} ) = - 19.5 \div ( - 4.4 - 15.1) = - 19.5 \div ( - 19.5) = 1$

$(3.42 - \frac{3}{4} ) \div ( \frac{4}{5} + 4.3) = (3.42 - 0.75) \div ( 0.8 + 4.3) = 2.67 \div 5.1 = \frac{267 \times 10}{100 \times 51} = \frac{89}{190}$

$(5 \frac{2}{3} - 8 \frac{3}{4} ) \times ( - 8 \frac{3}{4} + 5 \frac{2}{3} ) = (5 \frac{8}{12} - 8 \frac{9}{12} ) \times ( - 8 \frac{9}{12} + 5 \frac{8}{12} ) = {(5 \frac{8}{12} - 8 \frac{9}{12}) }^{2} = {( - 3 \frac{1}{12}) }^{2} = {( - \frac{37}{12} )}^{2} = \frac{1369}{144} = 9 \frac{73}{144}$