Fractions

This task is about adding and subtracting fractions.
Questions/instructions

What is the answer to the following fraction number sentences?

Write your answers after each number sentence. 
 
1.
   
14 + 14
 
   
2.   
 
23 + 13
 
   
3.   
 
12 + 12 + 12
 
   
4.   
 
313 + 213
 
   
5.   
 
3414
 
   
6.   
 
1214
 
   
7.   
 
6 – 12