Curated OER
Dividing Decimals 2.1
Occasionally, in mathematics, there are "short cuts" one can take. Sal explains a quick way to divide decimals numbers. He demonstrates that in certain cases, simply shifting the decimal point to the left will result in a correct answer.
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...
Curated OER
Multiplying Fractions and Mixed Numbers
Here is a great video explaining how to multiply a fraction by a whole number. Sal shows students how to put a whole number over 1 in order to multiply it by a fraction. He simplifies his answer and writes it as a mixed number.
Curated OER
Solving One-Step Equations 2
Help your students understand how to use their algebraic reasoning to solve a one-step equation, where they must solve for X. Add this video to a lesson or assign it as homework.
Khan Academy
Multiplying And Dividing with Significant Figures
Sal takes out the big guns - or in this case, big calculator - in this video, which carries the concept of significant figures even further. Sal shows how to multiply and divide significant figures using both electronic and handwritten...
Mathispower4u
Solve a One Step Equation With Decimals by Multiplying (Example)
Watching a video equals a chance to learn more about solving equations. Learners see how to solve one-step equations with decimals. The example the narrator works through requires multiplying with decimals to solve.
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 each...
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.
Mathispower4u
Solve a Linear Equation With Decimals and Variables on Both Sides (Example)
Create better equation solvers! The video presentation tackles solving an equation with variables on both sides with decimal coefficients. The instructor explains how to multiply by a constant to eliminate the decimals before continuing...
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 Turn a Decimal Into a Percent?
Multiply a decimal number by 100 to get a percent number. Or take a shortcut and merely move the decimal point two places to the right. But don't forget to write the percent sign after you move the decimal. Otherwise it's just a number...
Krista King Math
Decimal Equations
Extend your classes' understanding of solving equations by introducing decimals into the mix! Here, a video tutorial shows how to convert decimals to integers in an equation by multiplying by powers of 10. Shows three examples 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...
Virtual Nerd
How Do You Use an Equation to Find a Part of a Whole?
Watch the instructor change a percent into a decimal and multiply it by the original number to determine the percent. One idea would be to embed this video in a PowerPoint presentation, or assign it as homework with your flipped...
Curated OER
Estimating Surface Area
Kids might enjoy this dramatic presentation on estimating surface area. The fake Transylvanian accent is a bit distracting but the problem solving practices are sound. Dr. Crazy Pants rounds his decimal measurements then multiplies...
Curated OER
How Do You Solve a Decimal Equation Using Multiplication?
Solve this algebraic equation in one step by using the multiplication property of equality. Not sure what that property is? Then watch this video and see the instructor work out this problem. These are decimal numbers so make sure to use...
Curated OER
How Do You Turn a Percent Into a Fraction?
Change decimals to percent, fractions to decimals, percentages to fractions, etc. Remember how to do all of these conversions? It gets so confusing. Move the decimal to the right? Make it a fraction over 100? Multiply by? Oh my! So watch...
Khan Academy
Exponent example 2
Many young mathematicians get slightly confused when they are introduced to the concept of exponents. This resource will ensure that they never get confused again. Sal explains, quite emphatically, that 6 to the 8th power is NOT the same...
Curated OER
Two-Step Equations
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 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...
Curated OER
How Do You Solve a Word Problem That Compares Two Fractions?
Who made more money in the stock market, Brad or Ariel? Brad's stock went up, but Ariel's stock fluctuated up and down. Set up an inequality to solve this one. Ariel will have several terms as her stock fluctuated and Brad has a single...
Khan Academy
Dividing whole numbers and fractions: t-shirts
There is no better way to present a math problem than within the context of a story. Sal explains how he divides a fraction to solve a word problem where he must determine how many shirts can be made with 48 yards of fabric. Problems...
Curated OER
Taking Percentages
There are two percentage concepts covered in an informative video. The first is how to find a given percent of a given number; the second concept shows learners how to find a number when the percent is given. Sal finishes by...
Khan Academy
Understanding Exponents 2
Explain an exponential number. Sal shows that 5 to the 3rd power is 5x5x5 while 5x3 is 5+5+5. He demonstrates that they have very different answers. Note: This is part 2 in a set of videos on exponents. It may serve students best if this...