Answer:
1, 3/6 aka 1/2 books
2, 3/8 pizza left
3, 1 1/3 cups
4, 1/4 inch
5, 1/10
Explanation:
1, 2/6 + 1/6=3/6 simplify: 1/2
2, 4/8-1/8= 3/8
3, 2/3 + 2/3= 4/3 simplify 1 1/3
4, 7/8 + 5/8= 2/8, 1/4= 2/8, 5/8 + 2/8= 7/8
5, 11/20 - 9/20= 2/20 simplify: 1/10
hope it helpful :)