Question

Efectuați. Dau coroană​

Answer 1

Răspuns:

a)

$\frac{x}{2y} + \frac{y}{2y} = \frac{x + y}{2y}$

b)

$\frac{m}{2m + 2n} + \frac{1}{1}$

amplificam a doua fractie cu 2m+2n

$\frac{m}{2m + 2n} + \frac{2m + 2n}{2m + 2n} = \frac{m + 2m + 2n}{2m + 2n}$

simplificam 2m si 2n

$\frac{m}{1} = m$