Hot Math How-Tos
How To: Determine the equation of a line
Learn how to determine the equation of a line with this tutorial: The equation of a line can be determined by two given conditions.
How To: Understand & calculate density
In this episode of Science Theater Dr. Carlson helps you understand the concept behind Density and how it relates to Mass and volume and how to calculate the Density of a substance if its Mass and Volume are known. The Density of various metals is demonstrated using aluminum, tin, zinc, lead and copper of the same mass but different sizes. The easiest way to measure the density of a substance is also mentioned. Next, Dr. Carlson measures his own density using a scale and a bathtub.
How To: Calculate your GPA step by step
Ever wanted to know what your GPA score is? Your GPA is your grade point average, which is a measure of a students achievement in college. This means all your grades are averaged and your are given a cumulative "GPA". Most colleges and universities will figure up your scores for you but you can learn to do it on your own so that you can keep checking up on your scores and stay at the top of your game. This can be beneficial to students looking to better their grades.
How To: Solve a linear equation
This video explains how to solve a single variable linear equation. Keep in mind that your equation should be in the form ax + b = c. The goal is to solve for x. Isolate the variable. Begin by subtracting b from both sides of the equation. Look at your new equation. It should now be in the form ax = c - b. Solve for x by dividing both sides by a. Your expression is now in the form x = (c - b)/a. You have solved the expression for x.
How To: Find the percentage of a number easily
In this arithmetic basics tutorial the author shows how to find the percentage of a number. He says that hundred percentage of number is the same number. He says that if we find the percentage of a number where the percentage is less that 100, then the value of the number reduces. Similarly if we find the percentage of a number where the percentage is more than 100, then the value will be more than the original number. He says that to find the percentage of a number we need to mark a decimal ...
How To: Find the perimeter of a rectangle
For people who are learning geometry and would like to be able to find the perimeter of a rectangle, this video provides and quick and simple tutorial which provides the formula as well as a good example. The formula for finding the perimeter of a rectangle is simple the sum of all sides, or l+l+w+w, where l is the length and w is the width of the rectangle. After attaining the values of the length and width of the rectangle, you can simply plug in the values to this equation in order to find...
How To: Calculate the area of a circle given the radius
This video is about how-to calculate the area of a circle. It is in a very simple, and in an elementary school point of view. Of course, it can be done with either metric or imperial measures, as explained in the video. Only thing is that, it truly explains the simplicity of the calculation in every sense, which means, if you are not going for the ultimate knowledge on how things exist and survive in the form they are in, this video should be helpful. A grown man (woman) can't learn anything ...
How To: Evaluate fractions containing variables
This video is a great one on learning about evaluating fractions. The voice explains how to first plug in the numbers given for each variable in the fractions. He also explains the importance of simplifying the top and bottom first before simplifying the entire fraction. He also explains ways that would not be helpful in solving the problem and comparing that with the correct way. Then he notes the use of your simple math rules to find the answer. Excellent video for viewers.
How To: Find the standard error of the mean
In this video the tutor explains about the standard error of the mean. He starts explaining by drawing the diagram of a distribution and now he takes ten samples from the distribution and starts plotting them. He says that in theory if we do it infinite times then we can obtain the sampling distribution of the sampling mean. For the example he takes the number of samples as 10. Now depending on these values of n we can get different sampling distributions. Now he intends to find the mean of t...
How To: Find the volume of a rectangular prism quickly
In this video, you will see the steps for finding the volume of a rectangular prism written on a white board. The steps are labeled along the right side. A blue cursor boxes the steps as they are introduced on the board. The formula for finding volume is written along the top left. Colored arrows point out the measurements. Each step is presented in a colored format so it is easy to follow the steps. The final answer is circled in yellow so it is a cinch to compare your answer with the correc...
How To: Solve coordinate proofs as taught by students
This video shows the viewer about different shapes and what properties they have. it is very help full to anyone who is learning geometry or who wants to learn geometry. This video also shows a picture as the person labels then so you can see what he means by like opposite sides are parallel. The video covers all the basic shapes as well as showing that some shapes are more specific versions of other shapes, by showing that they have the same properties as well as different properties.
How To: Find the area of a triangle
In this video, learn how to calculate one of the most important puzzlers in math - the area of a triangle. This is one of the first things you will learn in geometry and is helpful in math as well as science classes. Check out this tutorial if you are having trouble grasping this concept. This video will show you how to calculate the area of a triangle easily and in detail. Master this and you will pass that next test for sure!
How To: Subtract integers
Subtracting integers is easy to do after watching this video. In this math tutorial, the narrator explains and illustrates the process of subtracting integers. He explains the rules of converting the plus and minus signs to make addition and subtraction easier to understand. Following the steps explained in this video will make these math problems a breeze.
How To: Rotate a shape about the origin 90° counter-clockwise
Davitily thinks that you can learn to rotate the images quite easily. In this video Davitily explains the process of rotating a geometrical shape about the origin. This rotation is counter-clockwise. Davitily explains the various steps involved in this process. Two steps are explained in this process. The explanation is very simple and done in a very interesting manner. This video is the perfect choice for people wanting to learn the rotation of shapes. This video is a must for people interes...
How To: Plot an ordered pair
How do you plot an ordered pair on a x, y grid? This video will explain everything, from the very basic idea to how to actual application. In this step by step tutorial, the viewers will be exposed to the techniques and skills required to accurately plot an ordered pair on the x, y grid. Each instruction is given with much clarity and explanation. Therefore, the viewers should have absolutely no problem plotting by themselves after viewing this tutorial video.
How To: Understand the central limit theorem
Central limit theorum is easily one of the most fundamental and profound concepts in statistics and perhaps in mathematics as a whole. In probability theory, the central limit theorum (CLT) states conditions under which the mean of a suffiently large number of independent random large variables (each with finite means and variance) will be normally distributed, approximately. Huh? If you are having trouble understanding central limit theorum and need help trying to solve it, check out this tu...
How To: Apply the 2nd Law of Exponents
Having trouble dividing exponents? Doug Simms from Free Math Tutoring provides an excellent tutorial on applying the 2nd Law of Exponents. If you need to know how to divide polynomials, watch this video covering easy to follow examples explaining and demonstrating the 2nd Law of Exponents. In this first part of a two video series, Doug's student explains how to subtract the exponents within a polynomial in a simple example that will help you leap over this common math homework hurdle.
How To: Convert decimals to percents in math
This video is about the mathematical calculation to convert decimal to percentages. In this video, step by step calculations are shown. Let us take an example of a number; say 0.345, and we want to convert this decimal number to a percentage. Then we have to shift the decimal to two places to right side. We then get the answer in percentage but don't forget to put the sign at last. This video has made it easier for me to make my children understand about the decimals and percentages.
How To: Deal with brackets in polynomials
This how-to video shows viewers how to solve math problems with brackets in polynomials. The person in the video teaches people how to solve the problem with a positive sign before the brackets. This segment does not show how to solve the trickier problem where there is a negative sign in front of the brackets. The tutor shows everything from removing the bracket due to the positive sign, to combining the similar terms for the result of the problem. This video can help anybody deal with brack...
How To: Carry digits to add multiple digit numbers
This video tutorial shows you the next step as a follow up from the last video, this one teaching you how to carry numbers so that you can add multiple digit numbers. When learning anything you want to go through and do a warm-up so that you get your mind ready to learn something new. Using the places in mathematics it teaches you the easy way to learn or teach advanced addition. After watching this video you should be able to go through any addition regardless of how many places there are in...
How To: Solve a system of equations with the comparison method
In this video tutorial the instructor shows how to solve equations by the comparison method. In this method he isolates either the x or y variables in both the equations and now compares the other side of equations directly to derive the value of the other variable. Now this derived value of the variable can be used by substituting it in one of the original variables to derive the value of the other variable. He goes on and shows how to do this with an example by solving it. This video gives ...
How To: Convert percents to decimals quickly
Convert percents to decimals: To convert percents to decimal involves simple three steps. For example to converting 125% the following steps are:
How To: Find Z with the Z-Score formula
In this video tutorial the instructor shows how to find Z with the Z-Score formula. He uses a sample problem to show how to find this. He tells you the formula for z which is a real simple formula. Now he notes down the formula on the board and brings in the example problem with sample values. He substitutes the values in the z-score formula and solves it finding out the z value. This video shows how to find z using the z-score formula and also demonstrates the formula using a simple example.
How To: Identify the slope and Y-intercept given y=mx+b
This tutorial shows how to identify the slope and y-intercept given the formula y=mx+b. In this formula m is always going to be the slope and b is always going to be the y-intercept. Therefore if your given a problem like the one displayed in this video: y= 8/3x + 9, the slope would be 8/3 and the y-intercept would be 9. When given these problems all you have to do is match the given numbers to the formula to find the slope and y-intercept.
How To: Find the circumference of a circle in Geometry
In this tutorial the author shows how to find the circumference of a circle. He says that the circumference of a circle can be calculated by using the formula circumference C = 2 * Pi * R, where R is the radius of the circle. He shows how to solve these kind of problems using some examples and calculating the circumference by substituting the value of radius in the formula. This video gives a good introduction on how to find the circumference of a circle.
How To: Convert percents to decimals
Math Problem Generator shows us how to convert the percentage into decimals in a simple and in a very effective manner. To convert the numbers from the percentage mode to a decimal mode you need to know how to shift the decimals. take any number which is in percentage mode, here it is taken as 85.6% and then take the decimal point and move it to the left two times and that is where you will find there is no more place to move. So the resulting decimal would be equal to 0.856. This is a simple...
How To: Convert fractions to decimals easily
This video teaches you how to convert fraction to decimals in three easy steps. The process of decimal to fraction conversion involves the use of the fundamental rule of fractions; the fraction should be written in its lowest terms.
How To: Multiply fractions with an easy method
In this video the tutor shows how to multiply fractions. She says that compared to adding or subtracting fractions, it is easy to multiply fractions. She says that to multiply fractions first we need to multiply both the numerators together to arrive at the new numerator. Similarly we multiply the denominators to arrive at the new denominator. Now we can further reduce this new fraction to its simple form which is the desired result. This video shows a small step-by-step method to multiply eq...
How To: Find the area of a triangle when given 2 sides & angle
This video shows you how to easily find the area of a triangle when you know the length of 2 sides and the angle between them. The first thing you have to do is mark the sides of the triangle by a, b, c, where a is the side between A and B, b is the side between B and C and c is the side between C and A. If you know 2 of these 3 sides an you know the angle between them you can find the area of the triangle very simple: Area= (a x b x sin c)/2, where a, b are the two sides and c is the angle b...
How To: Find the percent of a number
In this math made simple series of tutorials the author shows how to find a percent of a number. He shows that to compute x percentage of something we need to movie decimal point in the percentage number two places to the left. There fore to compute the percentage of a number we multiply it with the modified percentage number which has its decimal moved two places to the left. He goes and demonstrates this method by solving many sample problems. If you are looking to find out the percentage o...
How To: Multiply integers for beginners
In this introductory how - to video for pre-algebra, the lesson is simple and clear. You will learn the four basic rules for multiplying positive and negative numbers. You will be able to see the rules on the video screen and you will see two examples written on the white board. The video is short and only the basic explanation is given so you will not get lost in all the reasons behind the rules. This is a great video if you need a reminder on the rules for multiplication of positive and neg...
How To: Find an angle when there are pairs of parallel lines
Consider two pairs of parallel lines, one pair horizontally and another is inclined from vertical position. If one of the four angles is given, then the other three angles can be easily identified. First select the angle which is down to the known angle, it will be same as first one. Then according to the law, that a straight lines consists of 180 degrees. For example if the known angle is 114 degrees, the unknown angle will be 180-114= 56 degrees.
How To: Draw a perpendicular line from a point not on line
The narrator in this video shows you how to accurately make a line that is perpendicular to a given line using a compass. This technique involves using a compass to create two points on a line, which will be used to mark an "X" above the given line. Afterwards, all that is needed is to connect the points to create the line.
How to Use the OR operator: Do a union of two sets
Wondering how to do a union of two sets using OR operator?
How To: Subtract with borrowing
For people who are learning basic math skills, this video will show you how to subtract larger numbers which involve borrowing. If the top number on your rightmost digit is smaller than the number before it, you will need to borrow from the column before it. To do this, you will have to cross out the left hand number, subtracting one from its value. You can then add 10 to your original number and continue with your subtraction. If the left hand number is 0 and too small to be borrow from, you...
How To: Find a central angle
This math tutorial shows you using geometry how to find a central angle. The teaching tutorial shows you how each line and angle are used to determine the angles within the geometry problem so that you can figure out the answer to a question. The specific math problem is used for when you are given two diameters and an arc degree. This is a great explanation if you are struggling with any geometry related question or homework problem and would easily be used to help out as a refresher or to h...
How To: Draw a reflection in Geometry
In this tutorial the author shows how to draw reflections in geometry. He shows how to draw them with a couple of examples in which he uses a reflection line and an object whose image is to be reflected. Now he draws perpendicular lines to the reflection line from the vertex of the original figure. He draws similar lines to all the vertexes all of same length and now after joining the ends of those lines a reflection of the original figure is obtained. This video shows a step by step method t...
How To: Convert between metric units
Do you find yourself annoyed with converting between different metric units? If so, this is the tutorial that you need. This video teaches you how to convert between the metric units as well as the reasoning behind the conversion. By the end of the video, you will be able to convert any measurement in the metric system within seconds. By teaching you the prefixes of the metric system, you can also gain the ability to convert metric units in seconds and no longer fear this measuring system again.
How To: Solve a system of equations via the elimination method
Elimination in mathematics is used to find the solution set of a system of equalities. This video tutorial shows how to use elimination to find the solution set of a given equation and offers several examples to illustrate the process. Before applying this method, the equation must be in the form “Ax +By=C.” When graphing a set of mathematical equations that intersect, the answer to the elimination is the point on the graph where the two lines cross.
How To: Find the area of a kite
Math isn't all about finding the area of drawings.. you can apply those same concepts to finding the area of actual objects. In this video tutorial, learn how to find the area of a kite in a video made for students, by students. If you are familiar with geometry and finding area, you will most likely be able to master this concept quickly.