We are given the following sum of fractions
[tex]\frac{3}{7}-\frac{1}{5}[/tex]We are asked to round off each term to 0, 1/2, or 1.
Notice that the term 3/7 (0.43 in decimal) is closest to 1/5 (0.50 in decimal), so we will round off 3/7 to 1/2
The term 1/5 (0.20 in decimal) is closest to 0, so we will 1/5 to 0.
So, the fractions become
[tex]\frac{1}{2}-0=\frac{1}{2}[/tex]Therefore, the estimated sum of fractions is 1/2
