Introduction to long division: Dividing into larger numbers. Introduction to long division without remainders
Try out this page for more. https://www.khanacademy.org/math/arithmetic/multiplication-division/long_division/v/division-2
Practice your multiplication facts online. Knowing these facts well is essential to division.
http://www.playkidsgames.com/games/mathfact/mathFact.htm
http://www.mathplayground.com/multiplication01.html