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New exercises from Khan Academy 2020-09-17T17:04:09.000000
Updated: 25 min 13 sec ago

### Converting analog data to binary

Wed, 2020-06-03 18:33
Check your understanding of how computers use sampling to convert analog data to binary data  in this set of free practice questions designed for AP Computer Science Principles students.

### Quiz: Stars and Elements

Wed, 2020-06-03 14:29
Quiz 3.2

### Quiz: My Big History

Wed, 2020-06-03 14:24
Quiz 1.4

### Quiz: Claim Testing

Wed, 2020-06-03 14:24
Quiz 1.3

### Quiz: Welcome to the Big History

Wed, 2020-06-03 14:22
Quiz 1.0

### Phylogeny

Tue, 2020-06-02 22:58

### Subtract on a number line

Tue, 2020-06-02 19:04
Practice subtracting numbers like 784 and 391 using a number line. All numbers are less than 1000.

### Corrosion: Identify the compounds

Tue, 2020-06-02 07:27
Let's practice to identify the chemical compounds of corrosion

### Context: Judaism and Christianity

Mon, 2020-06-01 23:06

### Dilations and properties

Mon, 2020-06-01 22:58
Given a shape and the dilation that is performed on it, determine which properties the shape and its image share.

### Kiki Smith Quiz

Mon, 2020-06-01 22:50
Test your knowledge on this object.

### Determine if a function is invertible

Mon, 2020-06-01 22:29
Given the table of values of a function, determine whether it is invertible or not.

Mon, 2020-06-01 21:46
Check your understand of copyright, DMCA, Creative Commons and open source licenses in this set of free practice questions designed for AP Computer Science Principles students.

### Quadratics by taking square roots (intro)

Mon, 2020-06-01 19:15
Solve simple quadratic equations by taking the square root of both sides of the equation.

Mon, 2020-06-01 19:12
Solve quadratic equations of the form ax^2+bx+c=0 that can be rewritten according to their linear factors.

Mon, 2020-06-01 19:07
Solve quadratic equations of the form x^2+bx+c=0 that can be rewritten according to their linear factors.

### Quadratics by taking square roots

Mon, 2020-06-01 19:04
Solve quadratic equations of the form (x+a)²-b=0. These can be solved using square roots. For example, solve (x-5)²-4=0.

### Zero product property

Mon, 2020-06-01 18:21
Use the zero product property to solve quadratic equations. For example, solve (x-5)(x+2)=0.

### Convert units multi-step word problems (US customary)

Mon, 2020-06-01 14:12
Solve word problems that involve converting between US customary measures of distance, volume, and mass.

### Impact of crowdsourcing innovations

Mon, 2020-06-01 13:27
Check your understanding of the benefits and risks of crowdsourcing innovations in this set of free practice questions designed for AP Computer Science Principles students.