Question

Решите по действиям : 1) 1.8 : ( - 1 целая 2/3) + (-15 целых 2/3) : 1 целая 1/3 2) 3 целых 3/4 : 0.03 + 4.52 : ( -4 целых 5/27) 3) (1.545 : 1.5 - 1) * (-2 целых 2/3) - 0.5 * 4/15

Answer 1

$1.8 \div (1 \frac{2}{3} ) + (- 15 \frac{2}{3}) \div 1 \frac{1}{3}$
$1.8 \div ( - 1 \frac{2}{3} ) = \frac{9}{5} \div ( - \frac{2}{3} ) = - \frac{9}{5} \times \frac{3}{2} = - \frac{27}{10}$
$- 15 \frac{2}{3} \div 1 \frac{1}{3} = - 5 \times 2 \times \frac{1}{3} = - \frac{10}{3}$
$- \frac{27}{10} + ( - \frac{10}{3} ) = - \frac{27}{10} - \frac{10}{3} = - \frac{181}{30 } = - 6 \frac{1}{30}$