Active Math Posts — Page 43 of 45 « Math

How To: Solve a ten digit number math problem

Check out this video tutorial on how to Solve a ten digit number math problem. This video will show you the key to solving the puzzle to find a 10 digit number, such that 10 digits are divisible by 10, and the first 9 are divisible by 9, and so on.

How To: Perform an astonishing toothpick math trick

Can you satisfy this equation without touching any toothpick? Mentalism?!? Magic Powers?! Just try . Check out this how-to video to perform an astonishing toothpick math trick.

How To: Simplify square roots in algebra

Watch the following video to understand the steps necessary when simplifying square roots. To simplify expressions with radicals, follow these simple steps:

How To: Use the law of tangents in trigonometry

This video explains and provides examples for the law of tangents, a law occasionally used in trigonometry.

How To: Use cosine and arc cosine functions in trigonometry

Continuing with the trigonometry series, this lecture focuses on cosine and arc cosine.

How To: Learn about trigonometry

An introduction the trigonometry series with a primer of basic concepts.

How To: Work with 3-dimensional figures in geometry

An introduction to three-dimensional geometry types and working with them. This video is very detailed and good for people who have never worked with three dimensions in geometry before because it concerns only special case figures.

How To: Work with and solve circles in geometry

An intro to many of the key concepts for working with and solving circles. Circles are more complicated than polygons concerning their properties.

How To: Use matrices, Gaussian elimination, and determinants

A close look at using matrices, Gaussian elimination, and determinants. This video is good for beginners who have never used a matrix before.

How To: Learn about types of numbers

Learn about all the different types of numbers, like integers, irrational numbers, and real numbers, in great detail. Also includes how to use a number line, a dichotomist tool, and other methods of number manipulation.

How To: Use sigma notation in math

Sigma Notation. Tetrahedral Numbers. Pyramidal Numbers. You'll learn all about them and some relations between them. Know you're math, or Greek math.

How To: Use weaving numbers in math multiplication

This is Vedic multiplication or Waving multiplication. It also covers Fibonacci's Sieve or Lattice Multiplication, and John Napier's Bones multiplication.

How To: Use the well ordering principle in math

Here, you'll see how to prove that the Well Ordering Principle is equivalent to the Principle of Mathematical Induction.

How To: Use the Gauss Method to find triangular numbers

The first video is an elementary explanation of triangular numbers and a Gauss demonstration for the sum of the first 100 natural numbers.

How To: Multiply nines, the easy way

See this amazing math trick to help you multiply the number nine. It so easy, you won't believe it! Who needs multiplication tables anyway?

How To: Use special substitutions in calculus II

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this two-part calculus lesson on integrating with special substitutions; rational functions with sine and cosines: Karl Weistrass method.

How To: Use logarithms, with the basics

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this intermediate-algebra lesson on logarithms, the bare basics of them. Know nothing about logarithms? Well, you've come to the right place.

How To: Use logarithms in chemistry intermediate algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this intermediate-algebra two-part lesson on logarithmic applications, chemistry acids and bases. If you've never taken chemistry, well, you should probably go and take it first.

How To: Use scientific notation in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra two-part lesson on scientific notation. Find out what scientific notation actually is, and see how to work with it.

How To: Convert measurements in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra two-part lesson on conversions. Need to convert inches to feet? Feet to miles? Feet to yards? Well, check out how.

How To: Use the metric system in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra lesson on the metric system. If you want to know all about that glorious metric system, well, need I say more?

How To: Use metrix prefixes in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra lesson on metric prefixes. There's kilo, and deci, and centi, and well, you get the picture.

How To: Do metric conversions in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra three-part lesson on metric conversions. Why can't we all use the same system of measurement, who knows? But until we see this day, you'll need to know how to do this.

How To: Subtract numbers on an abacus calculator

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this two-part arithmetic lesson on subtracting with an abacus. Could this be any easier than adding? Maybe, can you "borrow" the knowledge to subtract these numbers without an electric calculator? See for yourself.

How To: Add large numbers with an acabus calculator

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this arithmetic lesson on adding with an abacus. Who needs an electronic calculator anyway? Well, these are some pretty big numbers. If you're scared of all things not-electronic, then stay away.

How To: Use Z tests for the mean in statistics

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this introduction to statistics lesson on using the Z tests for the mean. If you don't know about statistics, well, I don't know what to say.

How To: Use an abacus calculator

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this arithmetic lesson on adding with an abacus. Who needs an electronic calculator anyway?

How To: Add negative numbers in pre-algebra (ASL interpreted)

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra lesson on adding negative numbers together. You'll learn the easiest way to do it, and maybe even freshen up on your subtracting skills. Don't waste your time in summer school, learn it here.

How To: Find volume using rectangular solids in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra lesson on finding volume with the help of a few rectangular solids. Length times with times height is all you need to remember to get this stuff down.

How To: Factor using the ABC method in beginning algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this beginning-algebra two-part lesson on factoring with the ABC method. Solve those darn quadratic equations!

How To: Graph linear equations in beginning algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this beginning-algebra two-part lesson on graphing linear equations. This stuff is hard, yet it looks so simple, thanks to this video.

How To: Write the equation of a line in slope-intercept form

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this beginning-algebra lesson on writing lines in slope intercept form. M is the slope, and b is the y intercept.

How To: Add numbers on a number line in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra lesson on adding numbers on a number line. This is basic arithmetic here, so, if you want to get into algebra, start with the basics.

How To: Simplify a complex rational expression in algebra

Penelope, and eighth-grader, shows us how to simplify a complex rational expression in this algebraic problem. What better way to learn than from students still learning it, fresh in their heads?

How To: Find the surface area of a rectangular prism easily

These two math sixth-graders show us how to find the surface area of a rectangular prism. They used a tablet PC and the screen-capturing software, Camtasia Studio. If you always wanted to know how to calculate the area of a prism, then...

How To: Round a decimal up or down in math

If you haven't quite made it to school, or just can't afford it, maybe you had a family member killed by a mathematician, who knows, but whatever the reason, if you don't know how to round numbers and decimals, then this two-part video lesson is perfect for you.