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New exercises from Khan Academy 2020-08-05T10:11:09.000000
Updated: 1 day 17 min ago

Multiply and divide by powers of 10

Tue, 2020-07-14 15:47
Practice multiplying and dividing by powers of 10.

Identify chemicals based on their uses

Tue, 2020-07-14 09:24
Let's practice identifying some of the common salts based on their applications.

Read bar graphs (2-step problems)

Mon, 2020-07-13 23:09
Read and interpret a double bar graphs.

Benchmark angles

Sun, 2020-07-12 20:06
Visually identify common benchmark angles. 

Riemann sums in summation notation

Sat, 2020-07-11 19:17
Riemann sums and sigma notation practice problems

Accumulation of change

Sat, 2020-07-11 19:17
Practice associating the area under rate-of-change curves with net change.


Sat, 2020-07-11 19:17
Practice those optimization skills!

Identifying carbon reactions

Fri, 2020-07-10 10:07
Let's practice identifying the four types of carbon reactions by knowing the chemical properties of carbon.

Inflection points intro

Thu, 2020-07-09 19:37
Analyze the points of inflection of a function given the function's graph.

Spectroscopy and the electromagnetic spectrum

Thu, 2020-07-09 18:57
Check your understanding of molecular and electronic transitions in this set of free practice questions designed for AP Chemistry students.

Using Le Chatelier's principle

Thu, 2020-07-09 18:23
Practice using Le Chatelier's principle to predict what happens to a reaction when a stress is applied

Basic cell structures

Thu, 2020-07-09 18:18
Test your knowledge on the structures of cells!

The Progressives

Thu, 2020-07-09 18:15
Test your knowledge on the twentieth-century progressive movement!

Word problems: Solving quadratic equations

Thu, 2020-07-09 16:37
Let's solve some word problems involving quadratic equations.

Concavity intro

Thu, 2020-07-09 00:47
Practice your understanding of concavity.

Finding definite integrals using algebraic properties

Wed, 2020-07-08 20:59
Properties of integrals practice problems

Definite integrals over adjacent intervals

Wed, 2020-07-08 15:53
Practice your understanding of definite integral properties: integrating sums of functions, and taking the integral of a function multiplied by a constant.

Equal groups

Wed, 2020-07-08 14:48

Simplify square-root expressions

Wed, 2020-07-08 12:47
Practice simplifying expressions with multiple radical terms.

Connecting f, f', and f'' graphically

Wed, 2020-07-08 12:42
Identify which of three given graphs describes a function, which describes the function's first derivative, and which describes the function's second derivative.


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