Curated OER
How Do You Divide Decimals?
Converting decimals to whole numbers is explained. An instructor shows how to multiply a decimal to convert it to a whole number. She then goes on to explain how to find the answer to a division problem involving decimals.
Curated OER
How Do You Do Long Division with Decimals?
Review some long division that contains a decimal number. Do the division first and when that is completed then figure out where the decimal goes in the answer. Just don't let those decimals make you crazy about doing the long division.
Khan Academy
Dividing a Decimal by a Power of 10: Shortcut, Decimals, Pre-Algebra
Occasionally, in mathematics, there are "shortcuts" one can take. Sal explains a quick way to divide decimal numbers. He demonstrates that in some instances, simply shifting the decimal point to the left will result in a correct answer.
Curated OER
How Do You Divide a Decimal by a Decimal?
Many learners would look at this decimal division problem and just skip it. Don't let them do that! Figure out how to help your learners master long division. The teacher helps make decimals and long division seem doable.
Curated OER
How Do You Multiply Decimals?
Find the product of numbers that have decimals. First, ignore the decimals and multiply the integers. Second, count the place values of the decimals for each value given. Third, add the values together. Fourth, place the decimal in the...
Khan Academy
Multiplying Fractions and Whole Numbers: Mixed Number Answer, Pre-Algebra
Here is a great video explaining multiplying a fraction by a whole number. Sal shows students how to put a whole number over 1 to multiply it by a fraction. He simplifies his answer and writes it as a mixed number.
Khan Academy
Multiplying and Dividing with Significant Figures, Decimals, Pre-Algebra
Sal takes out the big guns—or, in this case, the big calculator—in this video, which takes the concept of significant figures even further. Sal shows how to multiply and divide significant figures using electronic and handwritten...
Curated OER
How Do You Multiply Mixed Numbers?
Multiply two mixed fractions. First, change them to improper fractions. Now, multiply the numerator times the numerator and the denominator times the denominator. Oh, that's a big number. Reduce it. Now, change it back into a mixed...
Krista King Math
Decimal Arithmetic
Teach the four operations with decimal numbers while focusing on the algorithms. The video instructor demonstrates one example each of adding, subtracting, multiplying, and dividing with decimal numbers. She explains the steps of...
Curated OER
How Do You Figure Out Which of Two Fractions is Bigger?
Trying to decide which method to use to compare the value of two fractions? You could find a common denominator, you could turn them into decimals, or you could cross multiply. Let's cross multiply because we like to multiply more than...
Curated OER
How Do You Figure Out a Percent of Change?
First identify the parts of the word problem. Next identify the variable, decide what formula to use, figure out the quantities, insert the quantities into the equation, and now solve. There are many parts to solving this word problem so...
Curated OER
How Do You Solve a Decimal Inequality Using Subtraction?
Isolate the variable to solve any equation. This equation happens to be an inequality but is solved no different than if it were just an equation. Use the subtraction property of inequality to solve this given problem. The numbers are...
Socratica
Using Scientific Notation
Scientists and engineers in every field use scientific notation. The Socratica video explains what scientific notation is and why people use it. Then, it offers examples of how to convert a number into and out of scientific notation....
Khan Academy
Example: Two-Step Equations, Linear Equations, Algebra I
Sal adds a few more steps to these problems as he solves algebraic equations with two steps, though he states that "there's more than one way to do it." Those who become confused by increasingly complicated algebra problems on a test...
Curated OER
How Do You Find a Missing Angle in a Triangle?
The interior angles of any and ALL triangles adds up to 180 degrees. So if given two of the angle degrees, is it possible to find the value of the third angle? Yes! Use the triangle sum theorem to solve for the missing angle. Watch this...
Khan Academy
Khan Academy: Multiplying and Dividing Decimals by 10, 100, 1000
Learn about the patterns that develop when multiplying and dividing decimals by 10, 100, and 1000.
Khan Academy
Khan Academy: Multiplying and Dividing Decimals by 10
Learn to multiply and divide decimals by 10 using fraction and place value understanding.
Math Mammoth
Math Mammoth: Multiply and Divide Decimals by 10, 100, and 1000: Part 2
In this lesson, students learn how to multiply and divide decimals by powers of ten. [5:31]
Art of Problem Solving
Art of Problem Solving: Multiplying and Dividing Decimals
Video tutorial provides examples that explain how to multiply and divide decimals. [7:12]
Art of Problem Solving
Art of Problem Solving: Multiplying and Dividing Decimals by Powers of 10
Video tutorial explains how to multiply and divide decimals by powers of 10.[6:23]
Math Mammoth
Math Mammoth: Multiply and Divide Decimals by 10, 100, and 1000
This video explains what multiplication or division of a decimal by 10, 100, and 1000 means in the context of a place value chart. [7:28]
BBC
Bbc: Skillswise: Decimals
This Skillswise site focuses on decimals. Included are a video about why learning decimals is important, fact sheets and worksheets about using decimals, and quizzes on the information presented. Be aware that this is from Great Britain,...
Khan Academy
Khan Academy: Multiplying and Dividing by Powers of 10
Sal multiplies and divides decimals by powers of 10.
Khan Academy
Khan Academy: 1 Step Multiplication/division Equations: Fractions & Decimals
Learn how to solve equations in one step by multiplying or dividing a number from both sides. These problems involve decimals and fractions. [7:51]