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