HELP ME!!! WHAT'S THE ANSWER OF ALL OF THESE!!!!!! 
im rly stupid
1.) 4 1/2 - 2 5/9 =???
2.) 1 2/3 - 1 5/8 =???
3.) 4 1/2 - 2 5/6 =???
4.) 3 1/2 - 4 1/3 =???
5.) 5 1/3 - 1 2/3 =???
6.) 2 3/7 - 2 1/7 =???
7.) 3 5/6 - 3 1/3 =???
8.) 3 1/3 - 1 4/5 =???
9.) 2 5/6 - 3 1/6 =???
10.) 3 2/3 - 3 1/2 =???
11.) 6 1/2 - 1 6/7 =???
12.) 5 1/3 - 1 3/4 =???
