Question

-1(целых) 4/5×2(целых) 7/9. ПОМОГИТЕ!!!

Answer 1

$-1\frac45\cdot2\frac79=-\frac{1\cdot5+4}5\cdot\frac{2\cdot9+7}9=-\frac{5+4}5\cdot\frac{18+7}9=-\frac95\cdot\frac{25}9=-5$