Coroana??
1.
[tex] \frac{1}{2} = \frac{3}{6} [/tex]
[tex] \frac{5}{7} = \frac{15}{35} [/tex]
[tex] \frac{a}{b} = \frac{3a}{3b} [/tex]
[tex] \frac{2x}{5y} = \frac{6x}{15y} [/tex]
2.
[tex] \frac{10}{15} = \frac{2}{3} [/tex]
[tex] \frac{15}{45} = \frac{3}{9} [/tex]
[tex] \frac{5a}{10b} = \frac{a}{2b} [/tex]
[tex] \frac{10a + 10b}{25x + 25y} = \frac{2a + 2b}{5x + 5y} [/tex]
