Select one of these video lectures: 1 - The Dawn of Numbers 2 - Roman Numerals: Sign-Value versus Positional Notation 3 - Decimal, Binary, Octal & Hexadecimal 4 - Whole Numbers, Integers, and the Number Line 5 - Commutative & Associative Properties of Addition 6 - Commutative Property of Multiplication 7 - Associative and Distributive Properties of Multiplication 8 - Multiplying Negative Numbers 9 - Division and Prime Numbers 10 - Factoring 11 - Fractions and Rational Numbers 12 - Arithmetic Operations with Fractions 13 - Reciprocals and Division with Fractions 14 - Creating Common Denominators 15 - Creating Least Common Denominators 16 - Reducing Fractions 17 - Improper Fractions and Mixed Numbers 18 - Converting Fractions to Decimal Numbers 19 - Converting Terminating Decimal Numbers to Fractions 20 - Converting Repeating Decimal Numbers to Fractions 21 - Exponentiation 22 - Exponents of One, Zero, and Negative 23 - Scientific Notation 24 - Simplifying Multiplied Exponential Expressions 25 - Simplifying Divided Exponential Expressions 26 - Simplifying Mixed Exponential Expressions 27 - Raising Exponential Expressions to Powers 28 - Raising Products and Quotients to Powers 29 - Roots and Unit Fraction Exponents 30 - Rational Exponents 31 - Simplifying Radical Expressions 32 - Irrational Numbers 33 - Real Numbers