Question

а) -0,2²×1 2/3+1/30:0,6

Answer 1

$- 0.2 {}^{2} \times 1 \frac{2}{3} + \frac{1}{30} \div 0.6 = - (\frac{1}{5} ) {}^{2} \times \frac{5}{3} + \frac{1}{30} \div \frac{3}{5} = - \frac{1 \times 5}{25 \times 3} + \frac{5}{30 \times 3} = \frac{ - 1}{5 \times 3} + \frac{1}{6 \times 3} = - \frac{1}{15} + \frac{1}{18} = \frac{ - 6 + 5}{90} = - \frac{1}{90}$