How to Multiply and Divide

How To : Translate a word problem into algebra

This video shows the method to change a word problem into algebra and to identify rational numbers among a group of numbers. In the first part of the video we take a word problem namely - The product of 9 and seven, less than a number. 9 multiplied by something can be expresse ...more

How To : Handle missing terms in algebraic long division

In this tutorial you are shown exactly how to do algebraic long division when terms are missing in the polynomial. Follow these steps and you can divide whatever you'd like: Dividend/Divisor = Quotient 1. Write out your equation. If there is a missing term you have to write ...more

How To : Simplify complex fractions

In this video you can learn how to simplify complex fractions. Look at the example in the illustration. To simplify this complex problem, you would first add the number 1 under the whole number in the denominator, to make it a fraction. Then change it from a division problem b ...more

How To : Find the lowest common multiples

Watchers of this video will learn how to find the "lowest common multiple", the lowest whole number that can be divided by each of two numbers evenly. For example, the lowest common multiple of 8 and 12 is the lowest number of which 8 and 12 are both factors. To find the lowes ...more

How To : Divide fractions with a simple method

This video describes how to divide fraction values using simple method. Example we will take as in video "12" should be divided with "1/2" that is "12%(1/2)=?". This is the example we should solve. In first step we has to flip the "Denominator" to easily find the output. So no ...more

How To : Find your happy weight

Losing weight can be a battle, but why not be realistic about your goals rather than kill yourself striving for a size 0? A happier alternative to the cycle of weight loss and gain is to achieve a weight you and your doctor can both live with. In this tutorial, learn how to ca ...more

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. Once you know the trick to adding and subtracting fractions with different denominators, you'll have no problem with these problems. Step 1: Add fractions with s ...more

How To : Choose fish for a cold water fish tank

This film will show you how to select fish for a cold water temperate aquarium. It will help you decide which types to choose and how many to keep in your tank. The type and number of fish you can keep will depend on the size of your tank. An easy formula for calculating how m ...more

How To : Make a Sonobe Jasmine Dodecahedron

Math Craft admin Cory Poole posted instructions on How to Make a Cube, Octahedron & Icosahedron from Sonobe Units, plus some great complex models in his article, How to Make a Truncated Icosahedron, Pentakis Dodecahedron & More. These models use the standard sonobe unit and a ...more

How To : Determine the area of a trapezoid

Need to figure out the area of a trapezoid for a household project? Even if you just want to sound smart, there is a simple formula that can be used every time you need to find the area of a trapezoid. Try the formula and see how good you are at geometry. A trapezoid is a fou ...more

How To : Divide proper fractions

This video shows you how to easily divide proper fractions. In the first step, you have to calculate how many times does the denominator fit into the numerator. You need to divide the numerator by the denominator. If the denominator does not fit into the numerator, you have to ...more

How To : Discover the area of a triangle

Before you can find the area of any geometrical figure, recall what you are finding when you solve for the area. The area is the surface of a 2-dimensional shape. When trying to find the area of a right triangle, the easiest way is to first double the triangle so that it resem ...more

How To : Derive the basic area of a triangle

In this video tutorial, viewers learn how to solve the area of a triangle. The formula for the area of a triangle is A = ½ x b x h or bh/2. The base of the triangle is always at the bottom; it is the side that the triangle sits on. The height is the length between the base and ...more

How To : Multiply fractions with mixed numbers

This video teaches the viewer how to multiply fractions with mixed numbers. You would first need to multiply the denominator by the whole number, and then add the product to the numerator. This number is your new numerator and the new denominator is the same as before. For exa ...more

How To : Calculate percentages

Learn how to calculate percentages with this easy video tutorial! One of the easiest way to calculate percentages is as follows: Consider an example by taking 10% of 80. Then now first step includes the division of percentage by 100 we get 10/100 which gives 0.1. Then multip ...more

How To : Read a ruler

Everyone has used a ruler at some point in their life, whether for art sizing, blueprint plans, or sizing up your widescreen television on your living room wall. But there's a lot of little ticks on the ruler that you may not be aware of. Your ruler shouldn’t be used only to d ...more

How To : Calculate a handicap in golf

This video presentation details the process of calculating a handicap in golf, in this presentation the handicap will be calculated on the USGA handicap system which is the official handicap system to be used in the United States. On each score card, there is a designation for ...more

How To : Find the geometric mean

It doesn’t matter how long ago your last geometry class was, you can still impress your friends by finding a geometric mean. The geometric mean can be used to find the average of numbers with out unusually high or low results effecting the result. The geometric mean of two nu ...more

How To : Solve Proportions

In this how to you will learn about proportions. A proportion is comparing two ratios. Here is an example of a problem. First, you cross multiply and show your work. Next, you simplify. After, in order to get the variable alone, you divide each side by four. Since you can't di ...more

How To : Scale Factor

What Is Scale Factor? Scale factor is the ratio of the length of the scale drawing to the corresponding length of the original object. Solving Problems We are told to find the scale factor when we are given the original and new dimension of an object. The formula for questi ...more

How To : Find the GCF

What Is GCF? GCF is an acronym for "Greatest Common Factor." GCF is the largest number that can divides evenly into 2 or more numbers. Step 1: The first step to finding the GCF is to use what you know about prime factorization. Using a factor tree, find the prime factors of ...more

How To : Do Prime Factorization

What Is Prime Factorization? Prime factorization is finding prime numbers that, when multiplied, equal the original number. Method The best and easiest way to do prime factorization is to use a factor tree. Step 1: In this example, we will look for the prime factorization ...more

How To : Prime & Composite Numbers & Factors

Here, you will learn all you need to know about prime and composite numbers. What Is a Prime Number? A prime number is a number that is great than 1and can only be divided by one and itself. Examples of prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 and much more... Is ...more

How To : Weigh Objects on Your iPhone Using 3D Touch

3D Touch on the iPhone 6S and 6S Plus is a pretty cool feature, and will only get better as more developers begin to roll its functionality into their apps. Almost as soon as it was announced, the idea to create an app that used 3D Touch to weigh objects was in the works. Unf ...more

How To : Knit a Mobius Dog Scarf

If you save scraps of yarn, and have a dog, this is an easy project for you. The Mobius scarf has the advantage of not having any ends to come untied, or dangle down for your dog to trip over, or get tangled in branches and stuff. I made this one for Pepper, my 16lb rat terrie ...more

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