Add or subtract the following fractions. Make sure to put your answer in simplest form.
1/2-1/4
7/9+2/6
3/7-2/5
1/3+4/8
5/6-3/9
2/3+7/8
7/12-6/16
4/7+2/4
3/5+1/2
35/50-10/50
Mrs. Vesci's bakery sold 3/6 of a chocolate cake, 1 2/3 of a pumpkin pie and 3 1/3 of a cookie cake. If each slice is 1/6 of a pie, how many slices were sold?
Find number that is between 2/3 and .66.