Răspuns:
[tex]\frac{1}{3}+\frac{5}{18}+ \frac{2}{9}+ \frac{4}{27}=\frac{^{6)}1}{3}+ \frac{5}{18}+\frac{^{2)}2}{9}+\frac{4}{27}=\frac{6+5+4}{18}+\frac{4}{27}= \frac{15^{(3}}{18}+\frac{4}{27}=\frac{^{9)}5}{6}+\frac{^{2)}4}{27}=\frac{45+8}{54}=\frac{53}{54}[/tex]
Explicație pas cu pas:
