Lumos Video Store
This page provides a list of educational videos related to Division Methods. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Division Methods.
Complex Numbers - Multiplying and Dividing
By PatrickJMT
This video lesson contains a few example problems on multiplying and dividing complex numbers. For multiplication, the FOIL method is discussed, and for division, the idea of complex conjugates is discussed.
Fractions are Division
By mathantics
A fraction is just a division problem written like a number. This video also reviews the parts of a fraction and introduces the idea of decimals.
Introduction to Division
By northstar15
Learn the basics of division including vocabulary and how to solve simple division problems. A teacher is using a whiteboard to explain the process as well as the vocabulary. He demonstrates two ways to write these division problems. Sound quality is poor.
Evaluating Logarithms | MathHelp.com
By MathHelp.com
In this example, notice that we have a polynomial divided by a binomial, and our binomial is in the form of an x term minus a constant term, or x – c. In this situation, instead of having to use long division, like we did in the previous lesson, we can divide the polynomials using synthetic division, which is a much more efficient method. Here’s how it works. We start by finding the value of c. Since –c = -3, we know that c = 3. Next, we put the value of c inside a box, so we put the 3 inside a box. It’s very important to understand that the number that goes inside the box always uses the opposite sign as the constant term in the binomial. In other words, since the constant term in the binomial is -3, the number that goes inside the box, is positive 3. Next, we write the coefficients of the dividend, which are 2, -7, 4, and 5. Be very careful with your signs. Now, we’re ready to start our synthetic division. First, we bring down the 2. Next, we multiply the 3 in the box times 2 to get 6, and we put the 6 under the -7. Next, we add -7 + 6 to get -1. Next, we multiply the 3 in the box times -1 to get -3, and we put the -3 under the 4. Next, we add 4 + -3 to get 1. Next, we multiply the 3 in the box times 1 to get 3, and we put the 3 under the 5. Finally, we add 5 + 3 to get 8. Now, notice that we have a 2, -1, 1, and 8 in the bottom row of our synthetic division. These values will give us our answer: the first 3 numbers represent the coefficients of the quotient, and the last number is the remainder. And it’s important to understand that our answer will be one degree less than the dividend. In other words, since our dividend starts with x cubed, and we’re dividing by x, our answer will start with x squared. So our answer is 2x squared – 1x + 1 + 8 over x – 3. Notice that we always use descending order of powers in our quotient. In this case x squared, x, and the constant. Finally, remember that we add the remainder over the divisor, just like we did in the previous lesson on long division, and we have our answer. It’s important to understand that we’ll get the same answer whether we use synthetic division or long division. However, synthetic division is much faster.
One-step equations with multiplication and division
By Khan Academy
Let's get a conceptual understanding of why one needs to divide both sides of an equation to solve for a variable.
One-step equations with multiplication and division
By Khan Academy
Let's ease into this, shall we? Here's an introduction to basic algebraic equations of the form ax=b. Remember that you can check to see if you have the right answer by substituting it for the variable!
One-step equations with multiplication and division
By Khan Academy
Remember that what you do to one side, you have to do to the other. Will you multiply or divide both sides to dump the fraction, x/a? Let's do it together.
One-step equations with multiplication and division
By Khan Academy
This equation can be simplified through a single step to solve for the variable. Can you help?
Understanding fractions as division
By Khan Academy
Understand the relationship between fractions, division, and mixed numbers.
Dividing / Division of Integers
By PatrickJMT
This video reviews the rule of signs. It then solves several multiplication and division problems using positive and negative integers.
Learn multiplication tables in a structured manner (grade 3 math) - very effective!
By Math Mammoth
This method (I call it a structured drill) allows children to learn the multiplication tables in grade 3 or 4 faster and much more effectively than random drilling!
My book Math Mammoth Multiplication 1 at http://www.mathmammoth.com/multiplica... uses this method also. The book covers both the concept of multiplication and the practice of all the tables. It is available both as an instant download and as printed copy.
See a free example lesson from the book:
http://www.mathmammoth.com/preview/Mu...
In the video, I use the table of 3 as an example and go through this three-step method.
In the first step, children memorize the skip-counting list. For the table of 3 this is: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36. They also practice saying it backwards, from 36 to 3.
In the second step, we work with the table itself, but it is written in order so the child can see its structure. The " randomness " comes from me (the teacher) pointing to various problems in a random order. I also like to point out certain benchmark facts to students: 10 x 3 is 30 and 5 x 3 = 15 are such facts because they're in the 10s table and in the 5s table, which the children probably have learned first.
We also practice the tables " backwards " where the " answers " are written and the student tells how many times 3 they are. For example, I point to ___ x 3 = 24, and the child is supposed to say " 8 " . This type of practice makes children learn basic division facts at the same time without realizing it! This really helps third grade students because division is also a topic for third grade math.
Division Word Problems
By TeacherTube Math
This is an explanation of how to solve a division word problem. She talks about writing down key words the steps to solving a word problem and checking your answer. Note that there is no actual word problem example in this video.
Understanding fractions as division
By Khan Academy
Understand 3/2 on the number line by thinking about it as a mixed number.
Dividing numbers: long division with remainders | Arithmetic | Khan Academy
By Khan Academy
Here we go with more long division practice. Ever wonder why we call it long division? What's long about it, anyway?
Video for Lesson 11: Basic Division
By mathwithlarry
This is a video for basic division. Division is nothing more than repeated subtraction and multiplication is repeated addition. Examples are solved and explained on a piece of paper. He explains that division is the opposite of multiplication in his example.
Introduction to long division
By Khan Academy
Dividing into larger numbers. Introduction to long division without remainders
Understanding fractions as division
By Khan Academy
Learn how 3 ������������ 2 is the same as 3 ��������������������� 1/2, which is the same as 3/2.
Division by 2 digits
By Khan Academy
There's a little bit of an art to dividing numbers by two or more digits. Let us show you...