Chapter 7~ Add and Subtract Fractions
http://www.math.com/school/subject1/lessons/S1U4L3GL.html
http://www.mathsisfun.com/numbers/fractions-mixed-addition.html
http://www.sheppardsoftware.com/mathgames/fractions/FruitShootFractionsAddition.htm
http://www.math-play.com/adding-and-subtracting-fractions-game.html
http://www.arcademics.com/games/speedway/speedway.html
http://www.funbrain.com/fractop/
http://www.ixl.com/math/grade-6/add-and-subtract-fractions-with-like-denominators
http://www.mathplayground.com/fractions_sub.html
http://www.mathplayground.com/fractions_add.html
http://www.sheppardsoftware.com/mathgames/fractions/mathman_add_subtract_fractions.htm
http://www.coolmath4kids.com/fractions/fractions-13-adding-subtracting-whole-mixed-numbers-02.html
http://www.coolmath4kids.com/fractions/fractions-13-adding-subtracting-whole-mixed-numbers-03.html