Hot Math Posts
How To: Solve a percent word math problem in algebra
A middle school has 1200 students. Of these, 25% are in the eighth grade. Yesterday, 95% of all eighth graders were present. How many eighth-grade students were absent yesterday?
How To: Add and subtract integers in algebra
When adding and subtracting integers, follow these math rules: Adding Integers
How To: Use the order of operations in algebra
Are you looking for a simple math explanation on order of operations? Remember the following sentence: “Please excuse my dear aunt Sally.” What does this sentence have to do with math? The first letter of each word stands for an operation. “P” stands for parenthesis, “E” for exponents, “M” for multiplication, “D” for division, “A” for addition, and “S” stands for subtraction.
How To: Solve two-step linear equations in algebra
This math lesson is designed to provide middle school teachers with free resources for teaching linear equations. Students can use this free resource to better understand how to solve simple equations while preparing for the upcoming CRCT test.
How To: Solve a linear equation word problem in algebra
This math lesson is designed to provide middle school teachers with free resources for teaching linear equations. Students can use this free resource to better understand how to solve simple equations while preparing for the upcoming CRCT test.
How To: Solve systems of equations in algebra
In this math lesson you will learn how to solve systems of equations. Systems of equations usually have 2 equations and two variables. You can solve a system of equations by using one of the following methods.
How To: Solve a system of equations in algebra
In this math lesson you will learn how to solve a system of equations. Watch the following video to learn how to translate a word problem into a system of linear equations.
How To: Solve inequalities with fractions in algebra
Solving math inequalities with fractions is easy when applying the rules presented in this video. • When you add or subtract the same number from each side of an inequality, the relationship between the two sides does not change.
How To: Graph linear equations in algebra easily
In this math lesson you will learn how to graph linear inequalities. Let’s graph the following inequality: 4x + y > 4
How To: Solve compound inequalities in algebra
In this math lesson, you will learn how to solve compound inequality problems. A compound inequality is a combination of two inequalities joined together by the words “and” or “or”.
How To: Solve square roots in algebra
In this lesson we will learn about one of the most important concepts in algebra SQUARE ROOTS. The square root of a number m is another number n that satisfies the following formula: m = n x n. You can also say that m is the square of n. The opposite of squaring a number is finding its square root. You can use the radical symbol to indicate that the square root of m is n:
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: Calculate square roots of numbers by hand in algebra
In this math lesson, you will learn how to find the square root of a number without using a calculator. You can even find the square roots of large numbers by following this simple algorithm. The above video demonstrates how to find the square root by hand.
How To: Solve simple interest algebra problems
In this math lesson we will learn how to solve problems involving simple interest. When you deposit money in a savings account, the bank pays you interest at a certain rate called interest rate. There are two types of interest: simple interest and compound interest. In this lesson we will talk about simple interest. We will use the following important formula:
How To: Solve compound interest algebra problems
In this math lesson we will learn how to solve compound interest math problems. Click the play button to start the video.
How To: Calculate sales tax in algebra
In this math lesson we will learn how to solve math problems involving sales tax. Remember these two important formulas:
How To: Use simple interest and compound interest in algebra
In this math lesson you will learn about simple interest and compound interest. Whenever you want to borrow money from a bank, you have to pay interest at a certain percent rate. The main difference between compound and simple interest is the fact that the simple interest is paid only on the principal, while the compound interest is paid on both the principal and the accumulated interest The simple interest is given by the following formula:
How To: Solve a math probability problem with a number cube
In this math lesson we will learn how to solve simple probability problems with a number cube. The probability of an event measures the likelihood that the event will occur.
How To: Solve a math probablity problem with two dice
In this math video we will learn how to solve a probability problem involving independent events with two number cubes.
How To: Use a spinner to solve math probablity problems
In this lesson we will learn how to solve probability problems involving a spinner. A probability measures the likelihood of a certain event. It always ranges between 0 and 1. The following formula can be used to find the probability of a particular event:
How To: Solve a probability math word problem
In this lesson, you will learn how to solve a probability word problem. Need help with your algebra and geometry? Well...
How To: Find the math probability of two independent events
Watch the following math probability video to learn how to find the probability of two independent events. This will help you with your algebra or geometry homework.
How To: Find permutations and combinations in math probability
In this permutation and combination math tutorial, we will learn how to find the number of possible arrangements in a set of objects. So, if you need help with your algebra or geometry homework, watch this.
How To: Build yourself a slide rule
Nate, the Mathematics Guy shows you the basics of a slide rule. He explains what a slide rule is and how you can build one of your very own!
How To: Multiply polynomials using FOIL in algebra
This is a teacher created explanation covering first, outer, two, terms, inner, last, and distributing in math. Multiply polynomials using FOIL in algebra.
How To: Use the abacus calculator
Ever wonder about the abacus? This venerable classic is surprisingly easy to use. Check out this brief demo on various abacuses.
How To: Learn math with a metronome and drumometer
Dan Britt teaches math concepts with the aid of a metronome and drumometer.
How To: Distribute algebra expressions
Learn how to distribute in simple algebraic expressions to help solve those mathematical equations.
How To: Understand algebra functions
What does f(x) mean? What does g(4) mean? We explore this and more in this 3-part series, "Understanding Math Functions."
How To: Do the disappearing dollar math trick
A math story problem in which you seem to come up a dollar short in the solution...but not really. Here's the trick with an explanation.
How To: Practice lattice multiplication in math
A mathcast done by a 5th grade class in Detroit, Michigan, USA on an alternative way of doing multiplication.
How To: Decode binary numbers
Understanding the Binary Numbering System and how to decode binary numbers.
How To: Calculate math without a calculator
Before the calculator and even the abacus was invented, there was a little instrument called the human brain that we used to do math. Remember that? While most of us turn to our trusty Ti-84s to do calculus homework or whip out our cell phone calculators to determine how much we should tip at Johnny Rocket's, it can often be much faster to use our own brains, along with a piece of paper and pencil.
How To: Add fractions by finding the least common denominator
This video shows students how to add fractions with different denominators. To add different fractions you must be able to find the least common denominator.
How To: Calculate ordinary differential equations
MIT Professor Arthur Mattuck gives a lecture on how to calculate with ordinary differential equations (ODEs). He also covers the geometrical view of y'=f(x,y), directional fields, and integral curves. Calculate ordinary differential equations.
How To: Calculate the area of a triangle
This video gives a step by step tutorial showing how to calculate the area of a triangle. This is a great video to help children with their homework.
How To: Improve your math skills with a free Speed Math game
In this tutorial you will see how to use Jimmy's speed math program that he wrote in Flash. A download to the program is included. This is a GREAT way to help your kids or students (or maybe adults?) get better at math.
How To: Calculate fast with your body parts
Learn to calculate fast with your body parts. Amazing trick to learn easily multiplication table or times tables (in just 2 min.)
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: Be a human calculator
Before we had the calculator and before we had the abacus we had the human brain to complete our math problems for us. Remember that? Well, it seems that few of us do, resorting to calculators on our phone for elementary subtraction problems and multiplication.