Question

a)(4/5-11/15)*5/11=? б)(18/25+3/5)*25/33=? в)7/88*(8/21+8/7)=? Найти значение выражений.

Answer 1

$а) (frac{4}{5} - frac{11}{15})*frac{5}{11}= (frac{4*3-11}{15})*frac{5}{11}=frac{1}{15}*frac{5}{11}=frac{1}{33} б) (frac{18}{25}+frac{3}{5})*frac{25}{33}= (frac{18+3*5}{25})*frac{25}{33}=frac{33}{25}*frac{25}{33}=1 в) frac{7}{88}*(frac{8}{21}+frac{8}{7})= frac{7}{88}*(frac{8+24}{21})=frac{7}{88}*frac{32}{21}= frac{4}{33}$

Answer 2

a)(4/5-11/15)*5/11= 1/15*5/11=1/33

б)(18/25+3/5)*25/33= 1,8/25*25/33=1

в)7/88*(8/21+8/7)= 7/88*1,11/21=4/33