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Acceleration

from Khan Academy (Free)

Acceleration

from Khan Academy (Free)

Acid/base

from Khan Academy (Free)

Do you remember the basics of acid/base chemistry? In this tutorial, Jay reminds you of a few definitions, shows you how the stability of the conjugate base affects the acidity of...

Acids and bases

from Khan Academy (Free)

Adding and multiplying polynomials

from Khan Academy (Free)

"Polynomials" sound like a fancy word, but you just have to break down the root words. "Poly" means "many". So we're just talking about "many nomials" and everyone knows what a...

Adding and multiplying polynomials

from Khan Academy (Free)

Adding and subtracting decimals

from Khan Academy (Free)

You get the general idea of decimal is and what the digits in different places represent (place value). Now you're ready to do something with the decimals. Adding and subtracting...

Adding and subtracting decimals

from Khan Academy (Free)

Adding and subtracting fractions

from Khan Academy (Free)

You've already got 2 cups of sugar in the cupboard. Your grandmother's recipe for disgustingly-sweet-fudge-cake calls for 3 and 1/3 cups of sugar. How much sugar do you need to...

Adding and subtracting fractions

from Khan Academy (Free)

Adding and subtracting fractions

from Khan Academy (Free)

Adding and subtracting negative numbers

from Khan Academy (Free)

You understand that negative numbers represent how far we are "below zero". Now you are ready to add and subtract them! In this tutorial, we will explain, give examples, and give...

Adding and subtracting negative numbers

from Khan Academy (Free)

Adding and subtracting rational expressions

from Khan Academy (Free)

Have you ever wondered what would happen if you divide one polynomial by another? What if you set that equal to something else? Would it be as unbelievably epic as you suspect it...