en pre algebra khanacademy 5/5 (1)

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Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

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Lessons

Mysterious negative numbers! What ARE they? They are numbers less than zero. If you understand the nature of below zero temperatures, you can understand negative numbers. We'll help. Practice this ...
546 views

Adding and subtracting negative numbers
546 views

Multiplying and dividing negative numbers
609 views

How to add and subtract fractions. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
577 views

Multiplying fractions
522 views

Dividing fractions
634 views

This example clarifies the purpose of order of operations: to have ONE way to interpret a mathematical statement. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy ...
616 views

Work through another challenging order of operations example with only positive numbers. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
632 views

Basic Exponents
580 views

negative exponents
616 views

fractional exponents
610 views

Intuition on why a^-b = 1/(a^b) (and why a^0 =1) Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
592 views

Introduction to exponent rules Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
683 views

2 more exponent rules with an introduction to composite problems Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
640 views

Using exponent rules to simplify radicals or square roots Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
556 views

An introduction to logarithms
653 views

Introduction to the first two logarithm properties.
608 views

Second part of the introduction to logarithm properties.
703 views

Introduction to scientific notation. An in-depth discussion about why and how scientific notation is used. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/ma ...
581 views

More scientific notation examples Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
614 views

Future doctors and nurses out there, take note. This unit conversion word problem deals with converting drug dosage units, something that is commonly done in hospitals. Give it a try with us. Pract ...
576 views

Common Divisibility Examples Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
644 views

Understanding how numbers are represented. Introduction to binary numbers
536 views

Conceptualizing different number systems
575 views

Converting between decimal, binary and hexadecimal number systems
643 views

Introduction to significant figures Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
680 views

Understanding the "rules of thumb" for significant figures Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
627 views

Multiplying and dividing with significant figures Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
566 views

Addition and Subtraction with Significant Figures Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
676 views

Pure Numbers and Significant Digits
565 views

Is -40 bigger than -10? When ordering negative numbers from least to greatest, careful that you don't get hung up on the "amount" of the number. Think about what that negative sign really means! Pr ...
535 views

When we compare numbers we use the concepts of greater than, less than, and equal to (=). The same is true of absolute values. Practice this lesson yourself on KhanAcademy.org right now: https://ww ...
641 views

Finding common denominators of multiple fractions to order them Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-alg ...
572 views

Simple idea that multiplying by a numbers multiplicative inverse gets you back to one
511 views

The simple idea that a number plus its negative is 0
545 views

Interpreting Linear Graphs Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/a ...
599 views