Fill in the blanks:
 
1. \(\frac{2}{3} + \frac{1}{4}\) \(=\)ii []
 
2. \(\left(\frac{2}{3}\right) + \left(\frac{8}{3}\right) = \)ii+23 []
 
3. \(\left(\frac{1}{9} + \frac{2}{3}\right)\frac{8}{3}= \)ii×83+ii×83 []