Răspuns:
a) [tex]\frac{4}{15} +\frac{2}{3} =\frac{4}{15} +\frac{10}{15} =\frac{14}{15}[/tex] (am amplificat 2/3 cu 5)
b)[tex]\frac{16}{93} + \frac{6}{31}= \frac{16}{93}+\frac{18}{93}=\frac{34}{93}[/tex](am amplificat 6/31 cu 3)
c)[tex]\frac{7}{32} -\frac{1}{16} = \frac{7}{32}-\frac{2}{32}=\frac{5}{32}[/tex](am amplificat 1/16 cu 2)
d)[tex]\frac{23}{42}-\frac{5}{14}=\frac{23}{42}-\frac{15}{42}=\frac{8}{42}=\frac{4}{21}[/tex](am amplificat 5/14 cu 3 iar apoi am simplificat 8/42 cu 2)
<<<Sper ca te-am ajutat!>>>
