Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Basic Addition
This video introduces basic addition concepts using objects and number lines to represent and add numbers. Practice problems are available. [7:42]
Khan Academy
Khan Academy: Algebra: Linear Equations 1
A video that demonstrates how to solve linear equations of the form Ax=B. There are three examples that vary using whole numbers and positive and negative fractions. [7:28]
Khan Academy
Khan Academy: Algebra: Special Products of Binomials
Video explains how to find special binomial products. Four examples are worked that show how to square a binomial. Three examples are worked that show the product of a sum and a difference (a +b)(a - b). This video also appears in the...
Khan Academy
Khan Academy: Algebra: Factoring Special Products
Demonstrates how to solve quadratic equations by factoring. Four equations are solved some involving special products including perfect square trinomials and difference of squares. This video also appears in the Algebra: ck12.org strand....
Khan Academy
Khan Academy: Algebra: Solving Systems by Graphing 2
This video demonstrates how to use a graph in order to determine the number of solutions for a system of linear equations. [3:26]
Khan Academy
Khan Academy: Algebra: Graphing a System of Inequalities
This video demonstrates how to set up a system of linear inequalities and solve it by graphing. [9:45]
Khan Academy
Khan Academy: Algebra: Evaluating Expressions With Two Variables
This video demonstrates how to evaluate an expression with two variables using substitution. [1:46]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Adding, Subtracting Negative Numbers
This video teaches addition and subtraction of negative numbers using a number line. Practice problems are available. [9:16]
Khan Academy
Khan Academy: Differential Equations: Separable Differential Equations
Video gives two examples of solving a separable differential equation. Includes determining the order of the equation and whether it is linear or non-linear. Shows an example with and without an initial condition. [12:00]
Khan Academy
Khan Academy: Algebra: Proportionality Constant for Direct Variation
This video demonstrates how to set up an equation for direct variation and solve for the variable "k" which represents the constant of proportionality. [1:44]
Khan Academy
Khan Academy: Algebra: Slope of a Line 3
This video demonstrates how to find the slope of two points that when graphed create a vertical line. The video uses the slope formula to demonstrate that the slope of a vertical line is zero. [5:05]
Khan Academy
Khan Academy: Algebra: Multi Step Equations 2
A video that demonstrates how to solve a multi-step equation. The equation contains integers and fractions. [5:46]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Introduction to Order of Operations
This video introduces the concept of order of operations with several examples. Practice problems are available. [9:40]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Multiplying Fractions
This video explains how to multiply two fractions and simplify the answer. Practice problems are available. [2:26]
Khan Academy
Khan Academy: Algebra: One Step Inequalities 2
Video demonstrating how to solve and graph a one-step inequality including how to reverse the inequality. [2:54]
Khan Academy
Khan Academy: Algebra: Compound Inequalities 2
Video demonstrates step-by-step how to solve and graph a compound inequality with a solution set that satisfies both constraints. Practice problems available. [5:13]
Khan Academy
Khan Academy: Algebra: Factoring Trinomials by Grouping 6
Video demonstrates how to factor a quadratic trinomial by grouping. The given trinomial has a leading coefficient of -12 and all terms have a common factor. [5:17]
Khan Academy
Khan Academy: Geometry: Finding Congruent Triangles
In this video tutorial [7:28], the instructor shows how to determine if two triangles are congruent using different triangle congruence postulates: SSS, SAS, ASA, AAS. Practice problems available.
Khan Academy
Khan Academy: Algebra: More Multiplying Polynomials
Video demonstrates how to use the distributive property to multiply a binomial by a trinomial. [2:34]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Least Common Multiple (Lcm)
This video shows how to find the least common multiple of three numbers using lists of multiples or prime factorization. Practice problems are available. [5:23]
Khan Academy
Khan Academy: Algebra: Finding Unit Prices
A short video with an explanation on how to find a unit price from a real-world application problem. This video also appears in the strand Arithmetic and Pre-Algebra: Ratios and Proportions. [2:01]
Khan Academy
Khan Academy: Algebra: Sum of Consecutive Odd Integers
This video demonstrates how to set up a linear equation in order to find three consecutive odd integers that add up to 231. It also shows how to solve the equation. [4:33]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Solving Percent Problems 3
This video demonstrates how to find the base number when given a percentage and amount. Practice problems are included. [5:26]
Khan Academy
Khan Academy: Algebra: Quadratic Functions 2
Video defining the vertex and axis of symmetry for a parabola. Vertex is found for a specific function by completing the square to change the equation from standard form to vertex form and then reasoning through the equation. Axis of...