Pre-Algebra Here are some videos on frequently asked topics in Pre-Algebra. Closed Captioning is available. Pre-Algebra FAQs Integers Adding IntegersSubtracting IntegersMultiplying/Dividing Integers Order of Operations Order of Operations Order of Operations (Fraction Bar Example) Fractions 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 Decimals Adding DecimalsSubtracting DecimalsMultiplying DecimalsDividing DecimalsFractions to Decimals 1Fractions to Decimals 2Decimals to Fractions Percents Intro to PercentsPercents, Fractions, and DecimalsThe Percent Equation