Ответ:
а) \(\frac{3}{10}-2\frac{1}{15}=\frac{9}{30}-\frac{61}{30}=-\frac{52}{30}=-\frac{26}{15}\).
б) \(2,4\cdot\left(-1\frac{1}{3}\right)=\frac{12}{5}\cdot\left(-\frac{4}{3}\right)=-\frac{16}{5}=-3,2\).
Ответ: а) \(-\frac{26}{15}\); б) \(-3,2\).
а) \(\frac{3}{10}-2\frac{1}{15}=\frac{9}{30}-\frac{61}{30}=-\frac{52}{30}=-\frac{26}{15}\).
б) \(2,4\cdot\left(-1\frac{1}{3}\right)=\frac{12}{5}\cdot\left(-\frac{4}{3}\right)=-\frac{16}{5}=-3,2\).
Ответ: а) \(-\frac{26}{15}\); б) \(-3,2\).