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New exercises from Khan Academy 2020-08-07T05:32:39.000000
Updated: 1 hour 22 min ago

### Key ideas: creative fiction 4

Tue, 2020-07-21 17:31
Key ideas: creative fiction 4th grade

### Non-Mendelian genetics

Tue, 2020-07-21 16:56
Test your knowledge of non-Mendelian genetics!

### Conditional repetition of instructions

Tue, 2020-07-21 14:14
Practice using iteration in computer programs to repeat code until a boolean expression is true for programs written in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

### Procedures with return values

Tue, 2020-07-21 14:04
Practice using return values from procedures in computer programs, in this set of free practice questions designed for AP Computer Science Principles students.

### Increasing & decreasing intervals

Tue, 2020-07-21 11:58
Find the intervals in which a function (given algebraically) is increasing or decreasing.

### Rational vs. irrational expressions

Mon, 2020-07-20 22:55
Determine whether an expression that is the combination of two rational/irrational numbers is rational or irrational itself.

### Visually add and subtract fractions

Mon, 2020-07-20 22:55
Practice adding and subtracting fractions that have different denominators. Problems have fraction diagrams.

### Electromagnetic induction

Mon, 2020-07-20 13:31
Let's practice some problems to test our understanding of electromagnetic induction.

### Second derivatives (implicit equations)

Mon, 2020-07-20 12:08
Find second derivatives of functions that are defined through an implicit equation.

### Multiplication and division word problems

Mon, 2020-07-20 01:07
Practice solving multiplication and division word problems. Some problems have remainders.

Mon, 2020-07-20 01:01

### Generating random numbers

Sun, 2020-07-19 21:03
Practice using random numbers for programs written in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

### Translation

Fri, 2020-07-17 23:09

### Regulation of gene expression and cell specialization

Fri, 2020-07-17 23:09
Test your knowledge of regulation of gene expression and cell specialization!

### DNA and RNA structure

Fri, 2020-07-17 22:11
Test your knowledge of DNA and RNA structure!

### Subtract 10s and 100s (no regrouping)

Fri, 2020-07-17 17:51
Practice subtracting 1, 10, or 100 from a number.

### Add 10s and 100s (no regrouping)

Fri, 2020-07-17 17:36
Practice solving problems like 344+20 and 344+200.

### Justification using second derivative

Thu, 2020-07-16 18:17
Justify properties of functions based on their second (and first) derivatives.

### Add and subtract within 20 word problems

Thu, 2020-07-16 14:01
Practice solving word problems by finding how many more (or fewer) objects there are. Numbers used are 20 or less.

### Break apart 3-digit addition problems

Thu, 2020-07-16 13:59
Practice breaking apart big addition problems using place value. For example, 234+567 is the same as 200+500+30+60+4+7.