Question

зделайте плиз завтра надо на математику дам 50 баллов

Answer 1

$(1 \frac{4}{9}+2 \frac{5}{6}-2 \frac{3}{4}):(2 \frac{1}{2}- \frac{1}{4})=( \frac{13}{9}+ \frac{17}{6}- \frac{11}{4})*( \frac{2}{5}- \frac{4}{1})= \frac{52+102-99}{36}* \\ \frac{2-20}{5} = \frac{55}{36}*(- \frac{18}{5})=- \frac{11}{2} = -5 \frac{1}{2}$

$(3,6-1 \frac{2}{3}):(4 \frac{1}{15}-2 \frac{7}{9})=(3 \frac{6}{10}- \frac{5}{3}):( \frac{61}{15}- \frac{25}{9})=( \frac{36}{10}- \frac{5}{3}):( \frac{61}{3}- \frac{5}{9})= \\ \frac{6}{1}* \frac{183-5}{9}=2* \frac{178}{3}= \frac{356}{3} =118 \frac{2}{3}$

$\frac{7}{9}* \frac{6}{7}- \frac{27}{10}* \frac{1}{10}+ \frac{13}{3}* 4= \frac{2}{3}- \frac{27}{100}+ \frac{52}{3}= \frac{55}{3}- \frac{27}{100} = \frac{11}{1} - \frac{9}{20} = \\ \frac{220-9}{20}= \frac{211}{20}=10 \frac{11}{20}$