Question

\frac{2}{3} + \frac{2}{6} = ?
\frac{3}{10} + \frac{1}{5} = ?
\frac{2}{3} + \frac{3}{9} = ?

Answer 1

2/3+2/6 ( amplifici prima fractie cu 2 pentru a aduce la acelasi numitor) = 4/6 + 2/6 = 6/6 = 1 

3/10+1/5 (amplifici a doua fractie cu 2) = 3/10 + 2/10 = 5/10 ( simplifici prin 5 ) = 1/2

2/3+3/9 (amplifici prima fractie cu 3) = 6/9+3/9 = 9/9 = 1