Hot Math Posts — Page 43 of 45 « Math

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: 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: 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 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: Work with integer exponents in beginning algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this beginning-algebra lesson on integer exponents. Don't get stuck in summer school, just watch and learn the math write here. Who needs a tutor, when you have the Internet? Watch these three videos.

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: Subtract negative numbers in pre-algebra

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra lesson on subtracting negative numbers. Don't get confused with those minus symbols. Learn how to manage them correctly, and with ease.

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

Lawrence Perez, from Saddleback College, and his assistant Charlie, give this pre-algebra lesson on finding the volume using rectangular prisms. You'll learn the formula for volume, and how to apply it. Get out your best pirate suit, and learn some math.

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.

How To: Add fractions in math using the LCD

For you non-educated folks out there, watch this to see how to add fractions using the least common denominator. Oh, you're a kid, well, why aren't you in school?

How To: Subtract fractions and mixed numbers

See how to subtract fractions. Turn those mixed numbers into improper fractions to solve. Improve your math skills!

How To: Measure geometry angles

Learn how to use a protractor when measuring math angles. An angle is formed by two rays with a common endpoint called the vertex. The most common unit used when measuring angles is the degree.

How To: Work with polygon geometry names

Watch this video to learn the important polygon names and how to classify different types of polygons.

How To: Solve Pythagorean Theorem proofs and geometry problems

In this math lesson we will investigate easy Pythagorean Theorem proofs and problems. The Pythagorean Theorem takes place in a right triangle. The longest side in a right triangle is called hypotenuse, and the other two sides are called legs. The hypotenuse opposes the right angle.

How To: Find the volume of pyramids in geometry

A pyramid is a three-dimensional figure with a polygonal base and a vertex. The base can be a triangle, quadrilateral, pentagon, hexagon, or other type of polygon.

How To: Work with tessellation shapes in geometry

Not all polygons are tessellation shapes. A tessellation is a collection of figures that can be put together to fill a plane surface without overlaps or gaps. I’m sure that you have already seen many tessellations in real life. The tiles in the kitchen and the puzzle you have solved are nothing but tessellations.

How To: Use algebra scientific notation and standard form

In this video we will learn about algebra SCIENTIFIC NOTATION and STANDARD FORM. Watch the above math video to learn how to change large numbers from standard form to scientific notation.

How To: Convert scientific notation to standard algebra form

Learn how to convert from scientific notation to standard form by watching the above math video. To change a number from scientific notation to standard form, move the decimal point to the left (if the exponent of ten is a negative number), or to the right (if the exponent is positive). You should move the point as many times as the exponent indicates. Do not write the power of ten anymore.