# Khan Academy

For the first time ever, an NFT masterpiece is being auctioned with 100% of the proceeds going to Khan Academy. It is being auctioned on OpenSea at...

Sal writes inequalities to represent scenarios in the real world.

Sal finds mistakes in solutions to one-step equations.

Sal solves one-step multiplication equations with fractional coefficients.

Sal shows an example where, given a context/graph, we connect a table and equation to analyze the relationship between the variables in the context.

Sal shows some examples of how to write equations given a context where two variables relate to each other, and how to use those equations to...

Sal introduces independent and dependent variables: how to identify the independent/dependent variable in a given setting, and how we write...

Sal shows some examples of how certain phrases suggest the need for grouping symbols when we write algebraic expressions.

Sal shows a few examples of how to write algebraic expressions with subtraction in the correct order based on different wordings.

Sal works through a few examples showing how to evaluate some common expressions we see involving variables, exponents, and fractions.

An example where we use order of operations to evaluate a more complex expression with fractions and exponents.

Sal introduces the order operations: what they are, why we use this order, and how to use the order of operations to evaluate some basic expressions.