# Keywords: Basic Skills (243)

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# Arithmetic and Pre-Algebra: Number Sets

This lesson discusses how to identify sets of numbers as natural numbers, ... (more)

This lesson discusses how to identify sets of numbers as natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Numerator and Denominator of a Fraction

Do you remember which is the numerator and which is the demonimator ... (more)

Do you remember which is the numerator and which is the demonimator of a fraction? This lesson will clarify the difference and provide a review of how to identiry the numerator and denominator of a fraction. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Order of Operations (Part 1 of 2)

This lesson begins a review the importance of the rule of Order ... (more)

This lesson begins a review the importance of the rule of Order of Operations. (less)

Subject:
Mathematics and Statistics
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Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Performing Arithmetic Calculations on Units of Volume

This lesson discusses standard measurements of volume. Also addressed is the difference ... (more)

This lesson discusses standard measurements of volume. Also addressed is the difference between a fluid ounce and a ounce of weight. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Perimeter and Unit Conversion

This lesson demonstrates conversion of different metric units of length in order ... (more)

This lesson demonstrates conversion of different metric units of length in order to solve for perimeter and width of a rectangle. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Prime Factorization

This lesson reviews the definition of a prime number and then shows ... (more)

This lesson reviews the definition of a prime number and then shows how to break a number down into all of its prime factors, using a factor tree and exponential notation. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Proper and Improper Fractions

What is the difference between a proper and an improper fraction? This ... (more)

What is the difference between a proper and an improper fraction? This lesson reviews the difference between these two kinds of fractions. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Ratios as Fractions in Simplest Form

This lesson discusses the fraction as a ratio and shows how to ... (more)

This lesson discusses the fraction as a ratio and shows how to write it in is simplest form. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Reciprocal of a Mixed Number

This lesson shows how to find the reciprocal of mixed numbers by ... (more)

This lesson shows how to find the reciprocal of mixed numbers by converting it to a proper fraction first. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Recognizing Divisibility

This lessons presents approaches for determining whether a number is divisible by ... (more)

This lessons presents approaches for determining whether a number is divisible by another number. (less)

Subject:
Mathematics and Statistics
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Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Representing a Number as a Decimal, Percent, and Fraction (Part 1 of 2)

This lesson shows how to write a percent as a decimal and ... (more)

This lesson shows how to write a percent as a decimal and a fraction. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
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Author:
Khan, Salman
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# Arithmetic and Pre-Algebra: Representing a Number as a Decimal, Percent, and Fraction (Part 2 of 2)

This lesson reviews how to write a fraction as a decimal and ... (more)

This lesson reviews how to write a fraction as a decimal and a percentage. (less)

Subject:
Mathematics and Statistics
Material Type:
Video Lectures
Collection: