Odpowiedź:
a) [tex]\frac{2}{3} + \frac{1}{4} =\frac{8}{12} +\frac{3}{12} =\frac{11}{12}[/tex]
b) [tex]\frac{5}{9} +\frac{3}{5} =\frac{25}{45} +\frac{27}{45} =\frac{52}{45} =1\frac{7}{45}[/tex]
c) [tex]\frac{2}{3}+ \frac{4}{5} =\frac{10}{15} +\frac{12}{15} =\frac{22}{15} =1\frac{7}{15}[/tex]
d) [tex]\frac{5}{8} +\frac{3}{7}= \frac{35}{56}+ \frac{24}{56} =\frac{59}{56} =1\frac{3}{56}[/tex]
e) [tex]1\frac{1}{2} +2\frac{3}{8} =1\frac{4}{8} +2\frac{3}{8} =3\frac{7}{8}[/tex]
f) [tex]\frac{2}{9} +1\frac{7}{27} =\frac{6}{27}+ 1\frac{7}{27}= 1\frac{13}{27}[/tex]
g) [tex]1\frac{5}{6}+3 \frac{1}{9} =1\frac{15}{18}+3 \frac{2}{18}=4 \frac{17}{18}[/tex]
h) [tex]2\frac{1}{10}+ 1\frac{7}{15}= 2\frac{3}{30} + 1\frac{14}{30} =3\frac{17}{30}[/tex]
