Question

найдите значение выражение

Answer 1

$( \frac{13}{30}- \frac{11}{20})* \frac{9}{5}= \frac{13*2-11*3}{60}* \frac{9}{5}=\frac{13*2-11*3}{60}* \frac{9}{5}=- \frac{7}{60}* \frac{9}{5}=- \frac{21}{100}= \\ =-0.21$