Question

помогите плиз 15 балов $-\frac{2}{8} *3,5-10,5*\frac{2}{7}$

Answer 1

$- \frac{2}{8} \times 3.5 - 10.5 \times \frac{2}{7} = - \frac{2}{8} \times \frac{7}{2} - \frac{21}{2} \times \frac{2}{7 } = - \frac{1}{8} \times 7 - 3 = - \frac{7}{8} - 3 = - \frac{31}{8 } = - 3 \frac{7}{8}$