Adding and subtracting fractions II

This task is about adding and subtracting fractions.
 
Write your answers in the shaded boxes.
You can use the white area to do your working.
 
1.    \(1 \over 4\) + \(1 \over 4\)
2.    \(2 \over 3\) + \(1 \over 3\)
3.    \(1 \over 2\) + \(1 \over 2\) + \(1 \over 2\)
4.    \(2 \over 4\) + \(3 \over 4\)
5.    \(1 \over 2\) + \(1 \over 4\)
6.    \(3 \over 4\) + 4 =
7.    3\(1 \over 3\) + 2\(1 \over 3\)
8.    \(3 \over 4\)\(1 \over 4\)
9.    \(1 \over 2\)\(1 \over 4\)
10.  6 – \(1 \over 2\) =  
11.  \(3 \over 4\)\(1 \over 2\) =