Question

$(\frac{9}{28} + \frac{1}{7})+ ( \frac{4}{7} - \frac{1}{28} )$

Answer 1

[tex] (\frac{9}{28}+ \frac{2}{28})+( \frac{8}{28}- \frac{1}{28} )= \frac{11}{28} + \frac{7}{28} = \frac{18}{28} [/tex] Am ajuns la $\frac{2}{28} si \frac{8}{28}$ pt ca le-am amplificat cu 2 pt a putea realiza adunarea si scaderea .
Sper ca te-am ajutat !