Tính giá trị của

----- Nội dung ảnh -----
**4**

Tính:

\(\frac{5}{18} + \frac{4}{9} = \frac{5}{18} + \frac{8}{18} = \frac{13}{18}\)

\(\frac{3}{7} + 5 = \frac{3}{7} + \frac{35}{7} = \frac{38}{7}\)

\(\frac{3}{7} \times \frac{7}{81} = \)

\(15 \times 6 = \)

\(\frac{19}{27} - \frac{2}{3} = \frac{19}{27} - \frac{18}{27} = \frac{1}{27}\)

\(8 - \frac{15}{6} = 8 - \frac{15}{6} = \frac{48}{6} - \frac{15}{6} = \frac{33}{6}\)

\(\frac{13}{9} : \frac{11}{9} = \frac{13}{9} \times \frac{9}{11} = \frac{13}{11}\)

\(35 : 5 = \)