Răspuns :
[tex] \frac{9}{2} - \frac{3}{4} =[/tex]
[tex] \frac{18}{4} - \frac{3}{4} =[/tex]
[tex] \frac{15}{4} [/tex]
[tex] \frac{18}{4} - \frac{3}{4} =[/tex]
[tex] \frac{15}{4} [/tex]