1/3 -2/5+1/2 - 5/6 + 1/5 + 1/4 - 9/20 = Options.
A) 0	B) 2/15	C) 2/5	D) 9/20	E) 5/6
We need to determine the result of 1/3 + 1/2 - 5/6 + 1/5 + 1/4 - 9/20   Let’s add the given fractions in two groups. In the group of the first three fractions, notice that1/3 and 1/2 share a common denominator of 6 with 5/6.   1/2 + 1/3 = 3/6 + 2/6 = 5/6   Thus, 5/6 – 5/6 = 0   Looking at the 2nd group of the fractions (1/5, 1/4, and 9/20), notice that1/5 and 1/4 share a common denominator of 20 with 9/20.   1/5 + 1/4 = 4/20 + 5/20 = 9/20   Thus, 9/20 – 9/20 = 0.   Thus, the result of 1/3 + 1/2 – 5/6 + 1/5 + 1/4 – 9/20 is 2/5.   Answer: 2/5
<result>C</result>
1/3 -2/5+1/2 - 5/6 + 1/5 + 1/4 - 9/20 =