Math 3A Adding-Subtracting Fractions

If a teacher is not available to help, please go here for extra help:
https://www.khanacademy.org/math/arithmetic/fractions

http://www.ixl.com/math/grade-4/fractions-with-denominators-of-10-100-and-1000

http://www.ixl.com/math/grade-4/add-and-subtract-fractions-with-like-denominators

http://www.ixl.com/math/grade-4/add-fractions-with-unlike-denominators

http://www.ixl.com/math/grade-4/add-and-subtract-mixed-numbers-with-unlike-denominators

http://www.ixl.com/math/grade-6/simplify-fractions

http://www.ixl.com/math/grade-6/convert-between-improper-fractions-and-mixed-numbers

http://www.ixl.com/math/grade-6/add-and-subtract-fractions-with-like-denominators-word-problems

http://www.ixl.com/math/grade-7/least-common-denominator

http://www.ixl.com/math/grade-7/add-and-subtract-fractions-word-problems

http://www.ixl.com/math/grade-7/maps-with-fractional-distances