Question

номер 913 пожалуйста.помогите,очень срочно

Answer 1

а)$(1 frac{11}{18}+ frac{13}{24}-1 frac{13}{36})* 1frac{3}{5}=(frac{29}{18}+ frac{13}{24}- frac{49}{36})* frac{8}{5}=( frac{116}{72} + frac{39}{72} - frac{98}{72} )* frac{8}{5}=$$frac{57}{72} * frac{8}{5}= frac{57*8}{72*5}= frac{57}{9*5}= frac{57}{45}=1 frac{12}{45}=1 frac{4}{15}$
б)$frac{14}{15} *1 frac{3}{7} + frac{7}{10} * frac{3}{14} = frac{14}{15}* frac{10}{7}+ frac{7}{10}* frac{3}{14}= frac{14*10}{15*7} + frac{7*3}{10*14} = frac{4}{3}+ frac{3}{20}=$$frac{80}{60}+ frac{9}{60} = frac{89}{60}= 1 frac{29}{60}$