3. (nu înțeleg cerința...)
4. a)
[tex] \frac{3}{7} + \frac{2}{7} = \frac{5}{7} [/tex]
b)
[tex] \frac{8}{10} - \frac{6}{10} = \frac{2}{10} [/tex]
c)
[tex] \frac{7}{8} - \frac{3}{8} + \frac{2}{8} = \frac{4}{8} + \frac{2}{8} = \frac{6}{8} [/tex]
d)
[tex] \frac{7}{10} + \frac{3}{10} - \frac{5}{10} = \frac{10}{10} - \frac{5}{10} = \frac{5}{10} [/tex]
5. 18÷9×3=2×3=6 baloane roșii
18-6=12 baloane albastre
Sper ca te-am ajutat! :"]
