Here are some videos on frequently asked topics in Pre-Algebra. Closed Captioning is available.
Adding IntegersSubtracting IntegersMultiplying/Dividing Integers
Order of Operations Order of Operations (Fraction Bar Example)
Equivalent FractionsSimplifying FractionsSimplifying Fractions (More Examples)Multiplying Fractions 1Multiplying Fractions 2Dividing Fractions 1Dividing Fractions 2Add/Subtract w/Like DenominatorsAdd/Subtract w/Unlike Denominators 1Add/Subtract w/Unlike Denominators 2Finding the LCD
Adding DecimalsSubtracting DecimalsMultiplying DecimalsDividing DecimalsFractions to Decimals 1Fractions to Decimals 2Decimals to Fractions
Intro to PercentsPercents, Fractions, and DecimalsThe Percent Equation