# Pre-algebra

The foundations of Pre-Algebra from The Khan Academy.
• Lectures 23
• Video 4 Hours
• Skill level all level
• Languages English
30 day money back guarantee!
Available on iOS and Android

### Discover

Find online courses made by experts from around the world.

### Learn

Take your courses with you and learn anywhere, anytime.

### Master

Learn and practice real-world skills and achieve your goals.

### Course Description

Videos on pre-algebra. You should be ready for the Algebra playlist if you understand everything here.

### What am I going to get from this course?

• Over 23 lectures and 3.5 hours of content!

### What you get with this course?

Not for you? No problem.
30 day money back guarantee

Forever yours.

Learn on the go.
Desktop, iOS and Android

Get rewarded.
Certificate of completion

### Curriculum

 Lecture 1 09:15 Adding and subtracting negative numbers Lecture 2 08:28 Multiplying and dividing negative numbers Lecture 3 09:48 How to add and subtract fractions. Lecture 4 08:25 Multiplying fractions Lecture 5 08:58 Dividing fractions Lecture 6 09:40 Order of Operations Lecture 7 05:20 More Complicated Order of Operations Example Lecture 8 09:45 Basic Exponents Lecture 9 06:25 negative exponents Lecture 10 09:11 fractional exponents Lecture 11 04:38 Intuition on why a^-b = 1/(a^b) (and why a^0 =1) Lecture 12 09:43 Introduction to exponent rules Lecture 13 07:43 2 more exponent rules with an introduction to composite problems Lecture 14 09:43 Using exponent rules to simplify radicals or square roots Lecture 15 09:47 An introduction to logarithms Lecture 16 09:16 Metric unit conversion Lecture 17 09:55 Translating speed units Lecture 18 09:14 Introduction to the first two logarithm properties. Lecture 19 10:04 Second part of the introduction to logarithm properties. Lecture 20 20:48 Introduction to Scientific Notation Lecture 21 12:49 More scientific notation examples Lecture 22 14:13 What a ratio is. Simple ratio problems. Lecture 23 10:44 Unit Conversion Example: Drug Dosage

### Join the biggest student community

6,400,000

Hours of video content

24,000,000

Course Enrollments

6,800,000

Students

### Reviews

Average Rating
4.0
Details
1. 5 Stars
3
2. 4 Stars
0
3. 3 Stars
0
4. 2 Stars
0
5. 1 Stars
1
• Brian Marcin

#### Sal Rules!

This was a great course, I used it to refresh myself for a college placement test. Sal gives the lectures and examples in a way that doesn't make it boring or monotonous and commits it to memory. I think I will do well, thanks to Sal!