Question

Помогите 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

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