Equal and Not Equal Videos - Free Educational Videos for Students in K - 12

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This page provides a list of educational videos related to Equal and Not Equal. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Equal and Not Equal.


The equals sign


By Khan Academy

Learn what the equals sign really means.

Grade 2 Math 10.9, Equal parts (of shapes)


By Joann's School

An explanation of Equal Parts as parts that are the same size and shape. Determining if shown parts are equal or not equal. Drawing one or more lines to create equal parts.

Probability and Equally Likely Events


By Art of Problem Solving

YouTube presents Probability and Equally Likely Events an educational video resource on math.

Equal Parts


By MCCS Teachers

This Introduction to Fractions tutorial focuses on making equal parts (partitions) of basic shapes (halves, thirds, and quarters).

Probability without equally likely events


By Khan Academy

Up until now we've looked at probabilities surrounding only equally likely events. What about probabilities when we don't have equally likely events? Say we have unfair coins?

Parallel Lines | MathHelp.com


By MathHelp.com

This lesson covers imaginary numbers. Students learn that the imaginary number "i" is equal to the square root of -1, which means that i^2 is equal to (the square root of -1) squared, which equals -1. Students also learn to simplify imaginary numbers. For example, to simplify the square root of -81, think of it as the square root of -1 times the square root of 81, which simplifies to i times 9, or 9i. To simplify 11/8i, the first step is to get rid of the "i" in the denominator by multiplying both the numerator and the denominator of the fraction by i, to get 11i/8i^2, and remember that i^2 = -1, so we have 11i/8(-1), or 11i/-8, or -11i/8.

The Equal Rights Amendment (ERA) Explained


By Hip Hughes History

This video explains the background of the Equal Rights Amendment or the 14th Amendment for women as it's called here. Also, it analyzes how it ultimately failed to pass

Division - Sharing Equally: Grade 3


By university of Houston mathematics education

Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

Division - Sharing Equally: Grade 3


By university of Houston mathematics education

Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

Proof: Vertical angles are equal | Angles and intersecting lines | Geometry | Khan Academy


By Khan Academy

Proving that vertical angles are equal. All Khan Academy content is available for free at www.khanacademy.org

Solving Logarithmic Equations | MathHelp.com


By MathHelp.com

Here we’re asked to evaluate each of the following logarithms. In part a, we have log base 7 of 49. To evaluate this logarithm, we set it equal to x. In other words, log base 7 of 49 = what? Notice that we now have an equation written in logarithmic form, so let’s see if we can solve the equation by converting it to exponential form. Remember that the base of the log represents the base of the power, the right side of the equation represents the exponent, and the number inside the log represents the result, so we have 7…to the x…= 49. Next, we solve for x. Notice that 7 and 49 have a like base of 7, so we rewrite 49 as 7 squared, and we have 7 to the x = 7 squared, so x must equal 2. In part b, we have log base 3 of 1/27. Again, to evaluate this logarithm, we set it equal to x, and convert the logarithmic equation to exponential form. Remember that the base of the log represents the base of the power, the right side of the equation represents the exponent, and the number inside the log represents the result, so we have 3…to the x…= 1/27. Next, we solve for x. Notice that 3 and 1/27 have a like base of 3, so we rewrite 1/27 as 1 over 3 cubed, and we have 3 to the x = 1 over 3 cubed. Next, 1 over 3 cubed is the same thing as 3 to the negative 3, so we have 3 to the x = 3 to the negative 3, which means that x must equal -3. Therefore, log base 3 of 1/27 = -3. So remember the following rule. To evaluate a logarithm, set it equal to x, convert to exponential form, and solve the equation using like bases.

Quadratic Word Problems | MathHelp.com


By MathHelp.com

A number is 56 less than its square. Find the number. To solve this problem, let’s translate the first sentence into an equation. A number, that’s x, is, =, 56 less than it’s square, that’s x squared – 56. Remember that “less than” switches the order around. In other words, “56 less than its square” is not 56 minus x squared, it’s x squared minus 56. Next, since we have an x squared term in our equation, we set it equal to 0 by subtracting x from both sides, and we have 0 = x squared – x – 56. Next, we factor the right side as the product of two binomials. In the first position of each binomial, we have the factors of x squared, x and x. In the second position of each binomial, we’re looking for the factors of -56 that add to -1, which are -8 and positive 7. So we have 0 = x - 8 times x + 7, which means that either 0 = x – 8 or 0 = x + 7. Finally, in the first equation, we add 8 to both sides, to get 8 = x. And in the second equation, we subtract 7 from both sides, to get -7 = x. So 8 = x or -7 = x. It’s important to understand that both of these answers work. Plugging an 8 back into the original problem, we have 8 is 56 less than 8 squared, or 8 = 8 squared – 56, which simplifies to 8 = 64 – 56, or 8 = 8, which is a true statement. And plugging a -7 back into the original problem, we have -7 is 56 less than -7 squared, or -7 = -7 squared – 56, which simplifies to -7 = 49 – 56, or -7 = -7, which is also a true statement.

Composite Functions: f(g(x)) and g(f(x)) | MathHelp.com


By MathHelp.com

In this problem, we’re asked to add the given polynomials, then we’re asked to subtract the second polynomial from the first. In part a, to add the given polynomials, we simply add parentheses t^2 + 6t – 9 + parentheses t^2 + 7t - 3. Notice that I used parentheses around the polynomials. This is a good habit to get into, even though the parentheses will not affect the addition. Next, we simply add the like terms, t^2 + t^2 is 2t^2, 6t + 7t is 13t, and -9 - 3 is -12. So we have 2t^2 + 13t – 12. In part b, we’re asked to subtract the second polynomial from the first, so we have parentheses t^2 + 6t – 9 minus parentheses t^2 + 7t - 3. Notice that the second polynomial is subtracted from the first. And again, notice that we use parentheses around each polynomial. Now, it’s important to understand that the minus sign outside the second set of parentheses can be thought of as a negative 1, so we need to distribute the -1 through each of the terms in the second set of parentheses. So, after rewriting our first polynomial, t^2 + 6t – 9, we have -1 times t^2, or –t^2, -1 times positive 7t, which is -7t, and -1 times -3, which is positive 3. Now, we combine like terms. t^2 – t^2 cancels out, positive 6t minus 7t is -1t, or –t, and -9 + 3 is -6. So we have –t – 6. Makes sure to distribute the negative 1 through the parentheses when subtracting the second polynomial from the first.

Area of diagonal generated triangles of rectangle are equal | Geometry | Khan Academy


By Khan Academy

In this video, Mr. Khan draws a box and two intersecting lines that produce several triangles. Mr. Khan proves that the area of these diagonal-generated triangles of the rectangle are equal. He goes over the formula for finding the area of a triangle. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The screen gets busy (and dark)--the viewer may want to open to 'full screen' to see everything. The sound is a little low

Vertical angles


By Khan Academy

Proving that vertical angles are equal

Algebraic Proofs in Geometry


By Sir Tyler Tarver

This video review the properties of equality that are used to write algebraic proofs. It identifies properties of equality and congruence.

Paradox


By WarnerJordanEducation

All podcasts are created equal, but some are more equal than others. This one certainly is more equal than the rest out there on the paradox. Learn it, love it, live it. Enjoy!