Active Math Posts
How To: Solve for X (advanced)
The video describes how to find 'x' in the algebraic equation -3x + 7x - 6 = 30
How To: Add fractions with unlike denominators
You can't add fractions when the denominators are not the same - it's a rule in math you can't ignore!
How To: Change an improper fraction into a mixed number
In a fraction where the bottom number, the denominator, is smaller than the top number, the numerator, it is called an improper fraction. Because it is improper, you'll want to fix it by turning it into a mixed number.
How To: Reduce fractions for easier manipulation
You should always try to reduce a fraction until it can't be reduced anymore. To do this, look at your fraction and figure out the greatest number BOTH the numerator and denominator can be divided by. This is called the GCF - the greatest common factor. In the video, the problem you must solve is (15/18). What number can be divided into both 15 and 18 evenly? The answer is 3.
How To: Find r-value & equation of regression line w/ EL531W
Need a little help in your Statistics class? In this statistics tutorial hosted by The Free Math Tutor, a demonstration of how to use the Sharp EL531W calculator to find the correlation coefficient (r-value) and the equation of a regression line is given. Want some more practice? For exercises and answer sheets, go here.
How To: Multiply fractions
Doug Simms gives a demonstration of multiplying fraction in a simple and easy manner. The simplest problems have proper fractions to be multiplied by proper fractions, and the answer can be arrived at by simply multiplying the numerator (upper value) of one fraction with the numerator of the other, carrying out the same operation with the denominators (lower values) of the two fractions, and finally, reducing the resultant fraction by a common factor, if any. Doug also gives three other examp...
How To: Use the SOH formula in trigonometry
Need a little help in your Trig class? In this two-part math tutorial, learn how to use the SOH (sine = opposite over hypotenuse) formula in high school Trigonometry. If you'd like to practice with exercises and answer sheets, you can go here.
How To: Square numbers faster
Become Harry Potter of Mathematics. In 5 min. reprogram your mind to calculate faster than the Calculator itself. Impress others with your super-fast mental mathematics.
How To: Divide fractions
Need a little help in the fraction department? Don't sweat it. Luckily, there is this two-part math tutorial on the subject of dividing fractions to help you along the way. In part one, learn how to divide proper fractions an in part two, learn how to divide mixed numbers with whole numbers.
How To: Multiply proper & improper fractions
So, you need a little extra help in the fractions department? No problem. In this two-part vieo tutorial, learn how to multiply proper fractions and mixed numbers in part one. In part two, learn how to multiply mixed numbers & multiply sets of improper fractions.
How To: Learn Calculus in 20 minutes
Did you sleep all semester in your Calculus class? Are you just waking up now to realize you have a test on Monday and that you're totally screwed? Well, luckily you can learn an entire semester worth of Calculus in just twenty minutes... or at leasts that's the hope.
How To: Calculate standard deviation
Looking to find the standard deviation of your set of values? Standard deviation quantifies how diverse the values of your data set are, and is useful in determining how different your numbers are from each other.
How To: Calculate percentage
Not sure exactly how to calculate a twenty percent tip for your waitress? Or how about how to figure out how much less your cost will be with that thirty percent off tag? Use these steps to calculate percentage, without a calculator.
How To: Find the slope of a line
Learn how to find the slope of a line in this math tutorial. Whether you're doing your math homework or trying to figure out how steep a mountain is, the slope of a line is simple to calculate and has many practical uses.
How To: Add fractions with unlike denominators using the lcd
Fractions can be tough, but in truth, they're one of the easiest concepts to understand in math. Figuring out fractions is the last thing you really have to worry about in math class, unless you have a horrible teacher, then you might want to check out this video tutorial to help you learn how to add fractions with unlike denominators, including how to find the LCD (lowest common denominator).
How To: Isolate a variable
If you're struggling a bit with algebra, check out this video to learn how to isolate a variable. Isolating a variable is a matter of separating and simplifying.
How To: Add and subtract fractions
Don't be scared of fractions! Adding and subtracting fractions is not that hard once you understand how to do it.
How To: Find the greatest common factor
If you've ever been asked to find the GCF, or Greatest Common Factor, of a series of numbers or algebraic expressions, check out this video to learn how.
How To: Divide fractions in math
When you see a problem involving a fraction, don't freak out. Dividing fractions is actually fairly easy once you learn the simple formula of how to do it.
How To: Calculate GPA
If you fear you're off to summer school, ease the stress of uncertainty with some simple math and know when to seek help with your grades.
How To: Find the average "mean" of a group of numbers
Need some help with the mean for your math class? The mean is otherwise known as the "average" of a group of numbers. This video tutorial will show you how to find the average "mean" of a group of numbers.
How To: Use applications of rational expressions in algebra
Lawrence Perez, from Saddleback College, and his assistant Charlie, give this beginning-algebra lesson on word problems (or applications) with equations of rational expressions. If you like math, and you like English, than what's the problem?
How To: Multiply large numbers
This video demonstrates, without narration, a trick to multiplying large numbers. To do the trick, just draw a diagonal line for every unit in the number and add up the number of times the lines cross.
How To: Divide complex numbers
Need a little help with your math homework? No problem, the Math Centre offers students video tutorials that will provide as a reference guide for self-study. Students get self-study resources targeted to the needs of individual courses, and teachers gain generic mathematics support and study materials for use with students.
How To: Add and subtract complex numbers
Need a little help with your math homework? No problem, the Math Centre offers students video tutorials that will provide as a reference guide for self-study. Students get self-study resources targeted to the needs of individual courses, and teachers gain generic mathematics support and study materials for use with students.
How To: Solve percentage problems
Check out this instructional math lesson that demonstrates how to solve percentage problems. In the 13th lesson, learn how to solve SAT problems using the Official SAT Study Guide. Here are the math problems and their page numbers that this video covers:
How To: Apply the method of mathematical induction
The first video explains the Method of Mathematical Induction. It also gives a background of Francesco Maurolico, Pascal and John Wallis. You'll see how to apply the Method of Induction to prove the sum of odd numbers is a square.
How To: Perform mental subtraction for math class
Having problems with subtraction. For some people, mathematics doesn't come easy, but there are tricks to solving certain problems, like subtraction. Check out this math video tutorial to learn how to perform mental subtraction for math class.
How To: Factor numbers by grouping in beginning algebra
Lawrence Perez, from Saddleback College, and his assistant Charlie, give this beginning-algebra three-part lesson on factoring numbers by grouping. This is the only math lesson where you'll learn how to cheat, so pay attention, but it's not what you think.
How To: Write the square root of a negative complex number
Need a little help with your math homework? No problem, the Math Centre offers students video tutorials that will provide as a reference guide for self-study. Students get self-study resources targeted to the needs of individual courses, and teachers gain generic mathematics support and study materials for use with students.
How To: Get cubes in math with mysterious Vedic methods
Having problems with cubes. For some people, mathematics doesn't come easy, but there are tricks to solving certain problems, like squares and cubes. Check out this math video tutorial to learn how to get cubes in math with mysterious Vedic methods.
How To: Multiply and divide fractions in algebra
This video demonstrates how to multiply and divide fractions in algebra. From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. Watch this video tutorial to learn how to multiply and divide fractions in algebra, For Dummies.
How To: Connect slopes and derivatives, For Dummies
From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. This is Mathematics for Dummies. Just watch this video tutorial to learn how to connect slopes and derivatives, For Dummies.
How To: Find approximate area with sigma notation, For Dummies
From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. This is Mathematics for Dummies. Just watch this video tutorial to learn how to find approximate area using sigma notation, For Dummies.
How To: Find the area between two curves, For Dummies
From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. This is Mathematics for Dummies. Just watch this video tutorial to learn how to find the area between two curves, For Dummies.
How To: Integrate by parts in calculus
From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. This is Mathematics for Dummies. Just watch this video tutorial to learn how to integrate by parts, For Dummies.
How To: Find the volume of a circular cross-section solid
From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. This is Mathematics for Dummies. Just watch this video tutorial to learn how to find the volume of a solid with a circular cross-section, For Dummies.
How To: Find the surface area of a surface revolution
From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. This is Mathematics for Dummies. Just watch this video tutorial to learn how to find the surface area of a surface revolution, For Dummies.
How To: Turn multiplication into sum
This is a handy math trick that show you how to turn a multiplication problem into a sum problem. An unusual way to perform a multiplication. You only need to be able to sum, halve and double numbers. It is not efficient, but it is rather intriguing and fun.
How To: Use the Pythagorean Theorem in basic geometry
Simple explanation of this nice fact from math. Math can be sometimes surprising, as well as elegant and pretty. Understanding this common geometric equation will help you out tremendously in math. The Pythagorean Theorem is basic geometry.