Question

Решите, пожалуйста, задание
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Answer 1

$( \frac{13}{30}- \frac{11}{20} )*1 \frac{4}{5} =( \frac{13*2}{60} - \frac{11*3}{60} )* \frac{9}{5} =( \frac{26}{60} - \frac{33}{60} )* \frac{9}{5} = \frac{26-33}{60} * \frac{9}{5} = \\ =- \frac{7}{60} * \frac{9}{5} =- \frac{7*9}{60*5} =- \frac{7*3}{20*5} =- \frac{21}{100}$