-1 goes on the number that is -1.
1.75 goes on the 3rd line in between 1 and 2.
-2 goes on the number -2.
-2 1/2 on the 2nd line after 2.
-5/2 or -2 1/2 goes on the 2 line before -2.
And 9/4 or 2 1/4 goes on goes on the 1st line after 2.
Hope this helps!! :)