Fractions Intro
Equivalent Fractions
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Create Equivalent Fractions 1 |
Create Equivalent Fractions 2 |
Create Equivalent Fractions 3
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Common Denominators
Adding and Subtracting Fractions
1Why do we need to find "common denominators"?
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2Working through those Practice Questions
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Adding Fractions with the same denominator.
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Adding Fractions with different denominators
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More complicated Fraction Addition & Subtraction
Sometimes, you need to add or subtract fractions in which one denominator is not a factor of the other. You still have to find a common denominator (make the pieces the same size) before you can add or subtract them. This video shows you a couple of the more common ways you can do that, along with some illustrations to help you understand.
Part 1 |
Part 2 |
Fraction Addition and Subtraction where neither denominator is a factor of the other
Converting Fractions
You'll come across different ways to represent fractions. It's useful to know how to use either method, and how to convert between them. Perhaps most critical is the understanding that changing one into the other doesn't actually change the value of the number. It's just a different way to look at it. It may be more helpful to express a fraction one way or another, depending on what you want to do with that number. (Example: Adding, Subtracting, Multiplying, Dividing, Comparing, etc)
Fraction Conversion Between Improper Fractions and Mixed Numbers
Practice converting Mixed Numbers to Improper Fractions |
Practice converting Improper Fractions to Whole Numbers |
Comparing Fractions
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Converting between Fractions, Decimals, and Percentages
How to convert between Fractions, Decimals, & Percent #1 |
How to convert between Fractions, Decimals, & Percent #2 |
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Using Steve Wyborny's Area Tiles to manipulate fractions
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GO AHEAD and GIVE IT A TRY YOURSELF
Triple Number Lines (and how to use them)
This is an activity as much as it is a tool. Spending some time with triple number lines makes us more competent when it comes to converting between different ways of representing numbers, and provides us a tool for checking whether our answers make sense. Often times, people make mistakes when converting between decimals, fractions, and percentages. Plotting both numbers on a double number line helps us determine whether our answer is reasonable.
Triple Number Lines (Continued)
Using Triple (or Double) Number lines can help you in other ways too.
Sometimes you want to find out what 1% of something is. We can use these number lines in combination with our understanding of equivalent fractions to figure out the answer to virtually any question involving fractions, percentages, and decimals.
For instance, if you know that 75% of $20 is $15, it's easy to calculate what 1%, 10%, and even 87% of $20.
Sometimes you want to find out what 1% of something is. We can use these number lines in combination with our understanding of equivalent fractions to figure out the answer to virtually any question involving fractions, percentages, and decimals.
For instance, if you know that 75% of $20 is $15, it's easy to calculate what 1%, 10%, and even 87% of $20.