a)
[tex] \frac{1}{3} + \frac{1}{2} = \frac{2}{6} + \frac{3}{6} = \frac{5}{6} [/tex]
b)
[tex]\frac{3}{4} - \frac{2}{5} = \frac{15}{20} - \frac{8}{20} = \frac{7}{20} [/tex]
c)
[tex] \frac{5}{8} + \frac{1}{7} = \frac{35}{56} + \frac{8}{56} = \frac{43}{56} [/tex]
d)
[tex] \frac{5}{6} - \frac{3}{7} = \frac{35}{42} - \frac{18}{42} = \frac{17}{42} [/tex]
e)
[tex] \frac{2}{7} + \frac{1}{5} = \frac{10}{35} + \frac{7}{35} = \frac{17}{35} [/tex]
f)
[tex] \frac{7}{8} - \frac{2}{3} = \frac{21}{24} - \frac{16}{24} = \frac{5}{24} [/tex]
Myślę że pomogłem ;)
