Instructional Video9:50
Khan Academy

Adding and Subtracting Fractions

For Students 7th - 9th
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...
Instructional Video0:36
Curated OER

Subtracting Decimals

For Teachers 5th - 8th
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...
Instructional Video1:29
Curated OER

Subtracting Fractions with Borrowing

For Teachers 5th - 8th
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.
Instructional Video1:18
Curated OER

Subtracting Fractions from Whole Numbers

For Teachers 5th - 8th
Duane draws a visual to show how to change a whole number into a fraction before subtracting.
Instructional Video1:47
Curated OER

Subtracting Negatives

For Teachers 5th - 8th
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.
Instructional Video2:26
Khan Academy

Subtracting Fractions with Like Denominators

For Students 3rd - 5th Standards
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...
Instructional Video4:54
Khan Academy

Subtracting Mixed Numbers 2, Fractions, Pre-Algebra

For Students 5th - 7th
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...
Instructional Video0:44
Curated OER

Subtracting Fractions

For Teachers 5th - 8th
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.
Instructional Video6:21
Curated OER

How Do You Subtract Mixed Fractions with Different Denominators by Regrouping?

For Teachers 6th - 12th
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...
Instructional Video5:45
Curated OER

How Do You Subtract Mixed Fractions with Different Denominators by Regrouping?

For Teachers 4th - 8th
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...
Instructional Video4:07
Curated OER

How Do You Subtract Two Rational Expressions with Different Denominators?

For Teachers 8th - 11th
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.
Instructional Video4:42
Curated OER

How Do You Subtract Two Rational Expressions with Different Denominators?

For Teachers 6th - 12th
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.
Instructional Video0:45
Curated OER

How Do You Subtract a Negative Number from a Positive Number?

For Teachers 6th - 8th
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.
Instructional Video1:51
Curated OER

How Do You Subtract Two Rational Expressions with the Same Denominator?

For Teachers 8th - 11th
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.
Instructional Video6:05
Curated OER

How Do You Subtract Polynomials Vertically?

For Teachers 6th - 12th
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...
Instructional Video1:54
Curated OER

How Do You Subtract Fractions with the Same Denominator?

For Teachers 4th - 7th
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.
Instructional Video2:33
Curated OER

How Do You Subtract a Whole Number from a Fraction?

For Teachers 6th - 12th
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...
Instructional Video1:51
Curated OER

How Do You Subtract a Whole Number from a Fraction?

For Teachers 5th - 7th
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...
Instructional Video7:06
Curated OER

How Do You Subtract Whole Numbers?

For Teachers 6th - 12th
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...
Instructional Video2:30
Curated OER

How Do You Subtract Fractions with the Same Denominator?

For Teachers 6th - 12th
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.
Instructional Video6:24
Curated OER

How Do You Subtract Whole Numbers?

For Teachers 3rd - 6th
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...
Instructional Video3:27
Curated OER

How Do You Subtract Fractions with Different Denominators?

For Teachers 4th - 7th
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...
Instructional Video6:12
Curated OER

How Do You Subtract Like Terms?

For Teachers 6th - 12th
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.
Instructional Video1:31
Curated OER

How Do You Subtract Decimals?

For Teachers 5th - 7th
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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