Scholastic
Study Jams! Decimal & Fraction Equivalents
If a candy bar costs 3/4 of a dollar, can your mathematicians figure out the cost in cents? After watching this animated video, your learners will see that every fraction can be a decimal and every decimal can be a fraction. The video...
Curated OER
How Do You Find the Range of a Data Set?
Looking for the range of a set of numbers? Well, that means you are looking for the difference between the largest value and the smallest value. So first, write the numbers in order from least to greatest. Then identify the largest value...
Curated OER
How Do You Find the Mean of a Data Set?
There are eight decimals numbers in this data set. Find the mean. So add all the terms together and then divide that total number by the number of terms in the data set. That's how you find the mean or average of a data set.
Curated OER
How Do You Find the Median of a Data Set?
Mean, mode, median? What's the difference? How do you find them? The teacher focuses on explaining median in this video. She gives a good explanation and shows how to order a data set to find the median number. This given data set has an...
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...
Curated OER
How Do You Subtract Decimals?
Subtracting? Line up the decimals, line up the decimals, line up the decimals! Put in place-holder trailing zeros, when necessary. Now do your subtraction. When you have your answer, bring down the decimal, bring down the decimal, bring...
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
Adding Decimals (2)
Adding decimals can be as easy as following the steps. This short presentation shows what to do and what not to do when adding decimal numbers together. Note: There is no audio commentary with this presentation.
Curated OER
Long Division of Numbers - Arithmetic Basics
Watch and learn how to do long division. You'll see and hear the process in an easy to follow step-by-step way. There is no doubt that this is a helpful tutorial great for those in need of a long division refresher. Multiple colors and...
Virtual Nerd
How Do You Figure Out the Volume of a Solution Using Percents?
A word problem, chemistry, and percent? I know you want to throw your hands in the air and run away from this problem, but please don't. Pay close attention as the instructor helps you unpack this word problem to set up an equation that...
Curated OER
What is the Formula for Simple Interest?
I=prt is the formula for interest. What does each variable represent? I =interest, p =amount originally invested, r =rate of interest (usually in percent), t =time. Now all you have to do is plug in the numbers and do the calculations.
Curated OER
How Do You Find the Range of a Data Set?
Looking for the range of a set of numbers? Well, that means you are looking for the difference between the largest value and the smallest value. So first, write the numbers in order from least to greatest. Then identify the largest value...
Curated OER
How Do You Subtract Decimals?
Subtracting? Line up the decimals, line up the decimals, line up the decimals! Put in place holder trailing zeros, when necessary. Now do your subtraction. When you have your answer, bring down the decimal, bring down the decimal, bring...
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
How Do You Multiply Decimals?
Using examples like 4.2 multiplied by 5.9, an instructor shows how to find the answer to these types of problems. She starts by explaining that the key to these problems involves ignoring the decimal points until you've multiplied the...
Curated OER
Change Fractions Into Decimals
This is a terrific way to help learners understand how decimals can be described as fractions. Using 2.675 as the first example, the instructor leads viewers through the process of describing this number as a fraction. She then addresses...
Curated OER
Multiplying Decimals
See how easy it is to multiply decimals. This clip shows learners that when you multiply decimal numbers, you multiply the same as you would a whole number, then plug in the decimal point at the end.
Curated OER
Adding Decimals
I'm so glad to hear Duane start this tutorial with the most important tip for adding decimals. He stresses the importance of lining up your decimals before you add. After that it's easy. You just add.
Curated OER
Comparing Decimals
Comparing decimals can be easy. Watch and learn how to line up four decimal numbers vertically and then starting from the left, compare each number in each place value to determine which is largest and which is smallest. This procedure...
Curated OER
Rational and Irrational Numbers
Irrational, rational, and terminating numbers are all covered in this math tutorial. The instructor uses a question from a math test to work through, showing how to compute and evaluate each answer to determine if the number given in...
Khan Academy
MTEL Math Practice Test: 5-8
In this video, covering questions 5-8, Sal demonstrates test-taking skills (reading a question properly, analyzing all possible choices) and pre-algebra-level skills. He guides viewers through problems involving simplifying expressions,...
Khan Academy
MTEL Math Practice Test: 9-11
This MTEL practice video focuses on problems 9-11, which include skill sets such as reading number lines and inequalities. Sal guides viewers through reading the question and working the equations with simple narration and colorful...
Curated OER
How Do You Compare Fractions by Converting to Decimals?
Two fractions with unlike denominators. Compare and figure out which one is greater. There are a couple of ways to do this. This time change the fractions to decimals to compare. Once the values are found, they can also be plotted on a...
Curated OER
What is the Formula for Simple Interest?
I=prt is the formula for interest. What does each variable represent? I =interest, p =amount originally invested, r =rate of interest (usually in percent), t =time. Now all you have to do is plug in the numbers and do the calculations.