Question

Решить: (/-это дробь) 43)3,4/20,4 44)27/44∙(5-24/5∙11/9) 45)22/3∙12 46)48: 9/20 47)3,4/20,4 48)(1 2/5)/(2 4/15)

Answer 1

$43) 3,4/20,4= \frac{34}{10}:\frac{204}{10}= \frac{34}{10}*\frac{10}{204}= \frac{1}{1}*\frac{1}{6} =\frac{1}{6}$

$44) \frac{27}{44}*(5- \frac{24}{5}* \frac{11}{9})=- \frac{117}{220}$ 

$\frac{24}{5}*\frac{11}{9}= \frac{8}{5}*\frac{11}{3}= \frac{88}{15}$

$5 - \frac{88}{15}= \frac{15*5-88}{15}= -\frac{13}{15}$

$\frac{27}{44}*(-\frac{13}{15})=- \frac{9}{44}*\frac{13}{5}=- \frac{117}{220}$

$45)\frac{22}{3}*12= \frac{22}{1} *4=88$

$46) 48: \frac{9}{20}= \frac{48}{1}*\frac{20}{9}= \frac{16}{1}*\frac{20}{3}= \frac{320}{3}=106 \frac{2}{3}$

47) смотри 43) примеры одинаковые

$48) 1 \frac{2}{5}:2 \frac{4}{15}= \frac{1*5+2}{5}:\frac{2*15+4}{15}= \frac{7}{5}:\frac{34}{15}= \frac{7}{5}*\frac{15}{34}= \frac{7}{1}*\frac{3}{34}= \frac{21}{34}$