Question

помогите пожалуйста((

Answer 1

$(2frac{3}{4}+2frac{1}{5})*16=(2frac{15}{20}+2frac{4}{20})*16=2frac{19}{20}*16=frac{59*16}{20}=frac{59*4}{5}=frac{236}{5}=frac{472}{10}=47,2$
$1frac{8}{17}:(frac{12}{17}+2frac{7}{11})=1frac{8}{17}:(frac{132}{187}+2frac{119}{187})=1frac{8}{17}:2frac{251}{187}=frac{8}{17}*frac{187}{631}=frac{88}{631}$