Corbett Maths
Percentages: Multipliers for Increasing and Decreasing by a Percentage
Solve two-step percent problems with a single multiplication. By reviewing how to find the percent of a problem, the video introduces the idea of finding multipliers to find solutions for increasing or decreasing percent problems. Pupil...
Corbett Maths
Percentages: Increasing or Decreasing by a Percentage
Increase or decrease the value. Individuals learn how to determine a new value after being either increased or decreased by a percent. Pupils then practice their skills using a worksheet that covers the concepts.
Corbett Maths
Percentages: Of an Amount (Non-Calc)
Know these four and be fine. Scholars learn how to calculate any percentage, all by knowing four easily calculated percents. Two worksheets provide opportunities for learners to refine their skills.
Corbett Maths
Percentages: Change
How much did it change? The presenter works two problems to demonstrate how to calculate percentage loss and increase. Pupils have one learning exercise to practice similar problems on their own.
Corbett Maths
Fractions to Percentages
Take a look at the percentage of fractions. Mathematicians learn two different methods to convert fractions to percents. Using two worksheets, classmates practice the methods to determine when one method works easier than the other.
Corbett Maths
Decimals to Fractions
Look at decimals in a different light. The resource uses place value to show learners how to convert decimals to fractions. Afterwards, class members practice their skills with two different worksheets.
Corbett Maths
Percentages to Fractions
The percent is just a fraction of what the whole used to be. The resource uses the definition of percents to convert percents to fractions. Pupils then use the worksheets to practice the skill.
Corbett Maths
Percentages to Decimals
Make a simple conversion. The short resource provides a description and demonstrates the process of changing percentages to decimals. Two worksheets provide pupils the chance to practice the skill.
Art of Problem Solving
Subtraction and the Distributive Property
There's got to be a better way. Scholars learn that the distributive property does work with subtraction and not just addition. Using that fact, the video shows how to find the product of two numbers by rewriting a complicated number as...
Art of Problem Solving
Subtraction Problems
Subtraction does not work with the commutative property ... or does it? Confronted with a difficult problem, the narrator realizes that by writing the subtractions as adding a negative, he can rearrange the problem. Pupils learn that as...
Art of Problem Solving
Introduction to Division
Use reciprocals for the purpose of division. The video shows how to use reciprocals to rewrite division problems. Pupils see that the definition of division as the multiplication by the reciprocal works for all types of numbers.
Art of Problem Solving
What's a Reciprocal?
If there is something in addition to get to the identity, does the same exist for multiplication? Using negative numbers to talk about the identity of addition, the video asks the question whether something similar exists for...
Art of Problem Solving
Subtraction with Negatives Part 2
Dive deeper into subtraction. The presenter shows two more ways to use the definition of subtraction to solve subtraction problems. Using the distributive and commutative properties, pupils learn how to solve problems such as subtracting...
Art of Problem Solving
Subtraction with Negatives Part 1
What is the definition of subtraction when dealing with negatives? The short video provides the definition of subtraction. Scholars observe as the presenter applies the definition to examples with negative numbers.
Art of Problem Solving
Commutative Property of Addition
For a change, order does not matter. A short video provides a definition of the commutative property of addition. Pupils develop an understanding that—unlike some operations—order does not matter for addition problems.
Art of Problem Solving
Why Do People Say that Repeated Addition is Multiplication?
Is a repeated addition definition mathematically valid? Using mathematical properties, a video explains why, even though there is a connection between repeated addition and multiplication, it is not a good definition. The properties hold...
Art of Problem Solving
Associative Property of Addition
Groupings are the way to go! The short video provides a description of the associative property of addition and gives an example. Learners view how to write the property using variables.
Math Antics
Convert Any Fraction to a Decimal
Find another way to write a fraction. Using long division, the video shows how to convert a fraction into a decimal. Learners use their knowledge of fractions to then set up the division problem.
Math Antics
Mixed Numbers
Is it proper to write an improper fraction as a mixed number? The resource first provides the definition of a mixed number. Pupils then learn the procedures to perform conversions between mixed numbers and proper fractions.
Math Antics
Dividing Fractions
Division of fractions is more than keep, change, flip. A video explains the reason to use the reciprocal when dividing fractions. Using the interpretation of fractions as division problems, the video explains the relationship of dividing...
Math Antics
Common Denominator LCD
Do not use the easiest but the first. The video shows a method to find a common denominator by finding the least common denominator to add fractions. By listing the multiples of the denominators, learners easily identify the least common...
Math Antics
Common Denominator ECD
Find the easiest common denominator. A video demonstrates finding a common denominator to add fractions. Pupils learn how to find a common denominator by using the product of the two denominators. After finding the common denominator,...
Math Antics
Adding and Subtracting Fractions
Why can't mathematicians add just like they multiply fractions? The resource provides a counterexample to show that the same rules for multiplying fractions do not work for addition. Using the counterexample, learners see the proper way...
Math Antics
Multiplying Fractions
Fraction multiplication works whether fractions are parts or division problems. The video shows learners the procedure to multiply fractions. It then goes on to explain why using both the interpretation as a fraction as a division...