# Pre-algebra

#### Learn the basics before tackling Algebra. Created by Khan Academy.

###### Average Course Length

7 hours

###### Skill Level

Beginner

##### Pick a lesson

1: Negative Numbers Introduction

2: Adding/Subtracting negative numbers

3: Multiplying and dividing negative numbers

4: Adding and subtracting fractions

5: Multiplying fractions

6: Dividing fractions

7: Introduction to Order of Operations

8: More Complicated Order of Operations Example

9: Level 1 Exponents

10: Level 2 Exponents

11: Level 3 exponents

12: Negative Exponent Intuition

13: Exponent Rules Part 1

14: Exponent Rules Part 2

15: Simplifying radicals

16: Introduction to Logarithms

17: Unit conversion

18: Speed translation

19: Introduction to logarithm properties

20: Introduction to logarithm properties (part 2)

21: Scientific Notation

22: Scientific Notation Examples

23: Introduction to Ratios (new HD version)

24: Unit Conversion Example: Drug Dosage

25: Common Divisibility Examples

26: Binary Numbers

27: Binary, Decimal and Hexadecimal Number Systems

28: Number Base Conversion Practice

29: Significant Figures

30: More on Significant Figures

31: Multiplying and Dividing with Significant Figures

32: Addition and Subtraction with Significant Figures

33: Pure Numbers and Significant Digits

34: Ordering Negative Numbers

35: Comparing Absolute Values

36: Ordering Fractions

37: Inverse Property of Multiplication

38: Inverse Property of Addition

39: Interpreting Linear Graphs