Question

1) 5+2*(-0,3)+0,3-1,2*(-1/2)

Answer 1

$5 + 2 \times ( - 0.3) + 0.3 - 1.2 \times ( - \frac{1}{2} ) = \\ \\ 5 - 0.6 + 0.3 - \frac{6}{5} \times ( - \frac{1}{2}) = \\ \\ 4.7 + \frac{3}{5} = \\ \\ \frac{47}{10} + \frac{3}{5} = \\ \\ \frac{53}{10} = 5 \frac{3}{10} = 5.3$