Pre-Algebra Here are some videos on frequently asked topics in Pre-Algebra. Closed Captioning is available. Pre-Algebra FAQs Integers Adding Integers Subtracting Integers Multiplying/Dividing Integers Order of Operations Order of Operations Order of Operations (Fraction Bar Example) Fractions Equivalent Fractions Simplifying Fractions Simplifying Fractions (More Examples) Multiplying Fractions 1 Multiplying Fractions 2 Dividing Fractions 1 Dividing Fractions 2 Add/Subtract w/Like Denominators Add/Subtract w/Unlike Denominators 1 Add/Subtract w/Unlike Denominators 2 Finding the LCD Decimals Adding Decimals Subtracting Decimals Multiplying Decimals Dividing Decimals Fractions to Decimals 1 Fractions to Decimals 2 Decimals to Fractions Percents Intro to Percents Percents, Fractions, and Decimals The Percent Equation