Question

find by appropriate property

Answer 1

$- \frac{2}{3} \times \frac{3}{5} + \frac{5}{2} - \frac{3}{5} \times \frac{1}{6} \\ = \frac{ - 2}{5} + \frac{5}{2} - \frac{1}{5} \times \frac{1}{2} \\ = \frac{ - 2}{5} + \frac{5}{2} - \frac{1}{10} \\ 2 \times ( - 2) + 5 \times 5 \div 5 \times 2 - \frac{1}{10} \\ = - 4 + 25 \div 10 - \frac{1}{10} \\ = \frac{21}{10} - \frac{1}{10} \\ = \ \frac{20}{10} \\ = \frac{2}{1} \\ = 2$