GreeneMath | Pre-Algebra

In this course, you will master the basic concepts of pre-algebra using GreeneMath.com's three step system. These concepts are fundamental to success in higher math classes such as Algebra, Geometry, and Calculus. We will review operations with whole numbers, then move on to learn how to perform operations with integers, fractions, and decimals. We will wrap up our course by learning how to find the mean, median, and mode for a group of numbers, along with how to convert between various units of measurement.

## Whole Numbers

### Pre-Algebra Lesson #1: Place Value

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### Pre-Algebra Lesson #2: Expanded Notation

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### Pre-Algebra Lesson #3: Inequalities & the Number Line

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### Pre-Algebra Lesson #4: Rounding Whole Numbers

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### Pre-Algebra Lesson #5: Properties of Addition

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### Pre-Algebra Lesson #6: Adding on a Number Line

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### Pre-Algebra Lesson #7: Vertical Addition

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### Pre-Algebra Lesson #8: Subtracting on a Number Line

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### Pre-Algebra Lesson #9: Vertical Subtraction

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### Pre-Algebra Lesson #10: Properties of Multiplication

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### Pre-Algebra Lesson #11: Vertical Multiplication

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### Pre-Algebra Lesson #12: Multiplication with Trailing Zeros

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### Pre-Algebra Lesson #13: Properties of Division

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### Pre-Algebra Lesson #14: Long Division

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### Pre-Algebra Lesson #15: Introduction to Exponents

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### Pre-Algebra Lesson #16: The Order of Operations

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## Integers

### Pre-Algebra Lesson #17: Introduction to Integers

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### Pre-Algebra Lesson #18: Absolute Value

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### Pre-Algebra Lesson #19: Adding Integers

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### Pre-Algebra Lesson #20: Subtracting Integers

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### Pre-Algebra Lesson #21: Multiplying & Dividing Integers

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### Pre-Algebra Lesson #22: Exponents with a Negative Base

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### Pre-Algebra Lesson #23: Order of Operations with Integers

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## Prime Numbers

### Pre-Algebra Lesson #24: Divisibility Rules for 2 - 12

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### Pre-Algebra Lesson #25: Factoring Whole Numbers

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## Fractions

### Pre-Algebra Lesson #26: Introduction to Fractions

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### Pre-Algebra Lesson #27: Mixed Numbers & Improper Fractions

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### Pre-Algebra Lesson #28: Finding the Greatest Common Divisor

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### Pre-Algebra Lesson #29: Simplifying Fractions

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### Pre-Algebra Lesson #30: Multiplying Fractions

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### Pre-Algebra Lesson #31: Dividing Fractions

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### Pre-Algebra Lesson #32: Finding the Least Common Multiple

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### Pre-Algebra Lesson #33: Adding & Subtracting Fractions

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### Pre-Algebra Lesson #34: Comparing Fractions

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### Pre-Algebra Lesson #35: Ratios & Rates

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### Pre-Algebra Lesson #36: Proportions

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### Pre-Algebra Lesson #37: Operations with Mixed Numbers

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### Pre-Algebra Lesson #38: Complex Fractions

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## Decimals

### Pre-Algebra Lesson #39: Decimal Fractions

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### Pre-Algebra Lesson #40: Comparing & Rounding Decimals

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### Pre-Algebra Lesson #41: Adding & Subtracting Decimals

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### Pre-Algebra Lesson #42: Multiplying Decimals

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### Pre-Algebra Lesson #43: Dividing Decimals

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### Pre-Algebra Lesson #44: Changing Fractions to Decimals

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### Pre-Algebra Lesson #45: Percents

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## Measurement

### Pre-Algebra Lesson #46: Mean, Median, & Mode

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### Pre-Algebra Lesson #47: Converting between U.S. Units

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### Pre-Algebra Lesson #48: Converting between Metric Units

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