Khan Academy
Adding and Subtracting Fractions
This video shows how to add, subtract, and simplify fractions using a pie graph and an infinite blackboard. Once he has established the rule, Sal throws the viewer a curve ball with a fraction subtraction problem that results in a...
Curated OER
Subtracting Decimals
Subtracting decimals is the same as subtracting numbers without decimal points. But wait, there is one key thing every kid needs to remember, you have to line up the decimals. How? Duane shows us how he lines up his numbers based on...
Curated OER
Subtracting Fractions with Borrowing
The teacher draws a visual on the white board to show how to change a whole number into a fraction by borrowing. This is necessary because the original written fraction is too small to subtract the second fraction.
Curated OER
Subtracting Fractions from Whole Numbers
Duane draws a visual to show how to change a whole number into a fraction before subtracting.
Curated OER
Subtracting Negatives
The teacher shows four different examples of subtracting negative numbers by leaving the first value the same and then adding the opposite of the second value.
Khan Academy
Subtracting Fractions with Like Denominators
Elementary school students can observe Sal as he subtracts fractions that have a common denominator. Because this concept is fairly straight forward, he focuses on simplifying his answer. A great video for those needing extra support in...
Khan Academy
Subtracting Mixed Numbers 2, Fractions, Pre-Algebra
To subtract mixed numbers, it may be necessary to find the least common multiple to establish a common denominator. This is just what Sal does in this presentation. First, he shows how to find a common denominator and then the process...
Curated OER
Subtracting Fractions
In forty-four seconds, Duane explains how to find a common denominator and then subtract a mixed fraction. Short, simple, and great for an at-home review.
Curated OER
How Do You Subtract Mixed Fractions with Different Denominators by Regrouping?
Are your young mathematicians having trouble with subtracting mixed fractions? Consider this video to supplement your teaching. An instructor explains step-by-step how to subtract mixed fractions with unlike denominators, showing viewers...
Curated OER
How Do You Subtract Mixed Fractions with Different Denominators by Regrouping?
Are your young mathematicians having trouble with subtracting mixed fractions? Consider this video to supplement your teaching. An instructor explains step-by-step how to subtract mixed fractions with unlike denominators showing viewers...
Curated OER
How Do You Subtract Two Rational Expressions with Different Denominators?
Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.
Curated OER
How Do You Subtract Two Rational Expressions with Different Denominators?
Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.
Curated OER
How Do You Subtract a Negative Number from a Positive Number?
Subtracting an integer is as simple as adding the opposite value. Watch this video to see an example of how to change the signs and then add the two integers.
Curated OER
How Do You Subtract Two Rational Expressions with the Same Denominator?
Rational expressions that are in the form of fractions. Yuk! The teacher demonstrates how to subtract one rational expression from the other when the expressions have a common denominator. Combine like terms and write it in simplest form.
Curated OER
How Do You Subtract Polynomials Vertically?
Subtract polynomials? Huh? First off find the additive inverse of the number you are subtracting. Next rewrite the polynomials one on top of the other. Make sure to line up the like terms and then write in placeholders. Now add the terms...
Curated OER
How Do You Subtract Fractions with the Same Denominator?
Having a common denominator is the best thing to have when subtracting fractions. If you have a common denominator then all you have to do is subtract the numbers in the numerator.
Curated OER
How Do You Subtract a Whole Number from a Fraction?
Follow along as the instructor demonstrates how to subtract a whole number from a fraction. First, she changes the whole number to a fraction. Then she finds the least common denominator of the two fractions. Finally, she does the...
Curated OER
How Do You Subtract a Whole Number from a Fraction?
Follow along as the instructor demonstrates how to subtract a whole number from a fraction. First, she changes the whole number to a fraction. Then she finds the least common denominator of the two fractions. Finally, she does the...
Curated OER
How Do You Subtract Whole Numbers?
Line up your numbers! The instructor shows you how to line your numbers up by place value. Then step by step she subtracts each place value. She demonstrates how to borrow when the top value is less than the bottom value you are...
Curated OER
How Do You Subtract Fractions with the Same Denominator?
Having a common denominator is the best thing to have when subtracting fractions. If you have a common denominator then all you have to do is subtract the numbers in the numerator.
Curated OER
How Do You Subtract Whole Numbers?
Line up your numbers! The instructor shows you how to line your numbers up by place value. Then step-by-step she subtracts each place value. She demonstrates how to borrow when the top value is less than the bottom value you are...
Curated OER
How Do You Subtract Fractions with Different Denominators?
Combining fractions with unlike denominators. Wait! You can't do that! You have to have common denominators to combine the numerator of fractions. Here's a quick review of changing the denominator by multiplying each fraction by that...
Curated OER
How Do You Subtract Like Terms?
Subtracting like terms, combining like terms, simplifying an expressions all refer to the same thing. The teacher explains two different methods of simplifying this subtraction expression.
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...
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