Khan Academy
Khan Academy: Algebra: Monomial Greatest Common Factor
Video defines what a greatest common factor is and demonstrates how to determine the greatest common factor of two given monomials. [3:13]
Khan Academy
Khan Academy: Geometry: Ca Geometry: Deducing Angle Measures
Demonstrates how to solve five different problems from a released California Geometry state test that involve finding the measures of angles in different polygons. This video also appears in the Geometry: Worked Examples section. [10:58]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Multiplication 7: More Examples
A video showing more examples of multiplication with multi-digit numbers. [6:18]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Rounding Decimals
This video demonstrates how to round a decimal number to the nearest tenth. Practice problems are available. [1:26]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Rounding Whole Numbers 1
This video shows how to round a five-digit number to the nearest hundred using a number line. Practice problems are available. [4:23]
Khan Academy
Khan Academy: Algebra: Evaluating a Polynomial at a Given Value
Demonstrates how to evaluate a polynomial for a given variable value. [1:09]
Khan Academy
Khan Academy: Algebra: Conic Sections: Introduction to Conic Sections
A video lesson introducing conic sections. Includes a sketch of each of the four fundamental conic sections in two dimensions. Also explains why they are called conic sections by illustrating how each is the intersection of a cone and a...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Equivalent Fractions Example
This video shows an example of writing equivalent fractions in the context of a word problem. Practice problems are available. [5:50]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Multiplying Whole Numbers
Two-digit by two-digit multiplication demonstrated through example in this short video. Practice problems are available. [3:18]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Comparing Fractions 2
This video shows how to compare two fractions using a several methods. Practice problems are available. [7:08]
Khan Academy
Khan Academy: Algebra: Graphing Inequalities 1
This video demonstrates how to determine if a set of ordered pairs is a solution to a two variable inequality. First the video shows how to plug the ordered pair into the inequality and solve, then the video demonstrates how to graph the...
Khan Academy
Khan Academy: Algebra: Rational Inequalities 2
A step-by-step breakdown on how to solve a rational inequality. [13:15]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Rounding Whole Numbers 3
This video shows how to round a 4-digit number to the nearest ten. Practice problems are available. [1:04]
Khan Academy
Khan Academy: Geometry: Three Points Defining a Circle
Demonstates that any three non-collinear points can be used to define a unique triangle with a unique circumcenter and circumradius. These, in turn, define a unique circle. The center of the circle is the circumcenter of the triangle....
Khan Academy
Khan Academy: Algebra: Conic Sections: Three Points Defining a Circle
A video lesson that describes how any three non-collinear points actually define a circle. First it is shown that three points define a triangle. Then it is shown that the circumcenter of that triangle is actually the center of the...
Khan Academy
Khan Academy: Algebra: X and Y Intercepts 2
This video demonstrates how to find the x and y intercepts given a linear equation. Once the intercepts are found it also shows how to graph the line on a coordinate plane. Practice problems available. [3:25]
Khan Academy
Khan Academy: Chemistry: Le Chatelier's Principle
A video lecture explaining Le Chatelier's Principle. The video shows how a reaction will favor one side of the reaction when stressed. [14:43]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Adding and Subtracting Fractions
This video shows how to add and subtract fractions with like and unlike denominators. Practice problems are available. [9:49]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Understanding Exponents 2
This video explains how to find the value of a number written in exponential notation. Practice problems are available. [1:15]
Khan Academy
Khan Academy: Geometry: Ca Geometry: Pythagorean Theorem, Compass Constructions
This video tutorial demonstrates solutions to problems #51-55 of the California Geometry released state test questions. Problems address proving and using the Pythagorean theorem and compass constructions. [12:35]
Khan Academy
Khan Academy: Algebra: Scientific Notation I
Video explaining scientific notation and negative exponents and then writing an example of a very small number in scientific notation. [4:12]
Khan Academy
Khan Academy: Linear Algebra: Invertibility Implies a Unique Solution to F(x)=y
Video first reviews what it means for a function to be invertible. Shows that if a function is invertible then there is a unique solution to f(x) = y. Also shows that if there is a unique solution to the equation f(x) = y for all y then...
Khan Academy
Khan Academy: Linear Algebra: Matrix Vector Products
Video starts with reviewing matrix notation. Defines multiplying a matrix by a vector and shows examples. Shows how the matrix-vector products can be interpreted as the dot product of column vectors with a matrix or as a weighted linear...