Răspuns :
[tex] \frac{18}{12} [/tex] + [tex] \frac{1}{1} [/tex] (amplificam a doua fractie cu 12)
[tex] \frac{18}{12} [/tex] + [tex] \frac{12}{12} [/tex] =[tex] \frac{30}{12} [/tex] (simplificam cu 2⇒[tex] \frac{15}{6} [/tex]
[tex] \frac{18}{12} [/tex] + [tex] \frac{12}{12} [/tex] =[tex] \frac{30}{12} [/tex] (simplificam cu 2⇒[tex] \frac{15}{6} [/tex]