Question

Efectuati: punctul d) va rog.​

Answer 1

$- \frac{4}{5} \times ( - \frac{3}{16} + \frac{1}{8} ) + \frac{3}{10} \times (1 - \frac{1}{2}) =$

aducem fractia 1/8 la acelasi numitor cu fractia -3/16 amplificand o cu 2

aducem fractia 1(1/1) cu acelasi numitor cu fractia -1/2 aplificand o cu 2

$- \frac{4}{5} \times ( - \frac{3}{16} + \frac{2}{16} ) + \frac{3}{10} \times ( \frac{2}{2} - \frac{1}{2} )$

$- \frac{4}{5} \times ( - \frac{1}{16} ) + \frac{3}{10} \times \frac{1}{2}$

- inmultit cu - da +

se simplifica 4 cu 16 prin 4 si obtinem:

$\frac{1}{20} + \frac{3}{20}$

$\frac{4}{20}$

se simplifica prin 4, rezultatul final fiind:

$\frac{1}{5}$