Tính giá trị của

----- Nội dung ảnh -----
**4**

Tính:

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

$\frac{3}{7} + 5 = \frac{3}{7} + \frac{35}{7} = \frac{38}{7}$

$\frac{3}{7} \times \frac{7}{81} =$

$15 \times 6 =$

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

$8 - \frac{15}{6} = 8 - \frac{15}{6} = \frac{48}{6} - \frac{15}{6} = \frac{33}{6}$

$\frac{13}{9} : \frac{11}{9} = \frac{13}{9} \times \frac{9}{11} = \frac{13}{11}$

$35 : 5 =$