This pre-algebra lesson provides shortcuts for multiplying and dividing with significant figures.
- Author:
- Khan, Salman
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This pre-algebra lesson reviews exponent rules and explains exponent intuitions and why a^-b = 1/(a^b) (and why a^0 =1).
- Author:
- Khan, Salman
This pre-algebra lesson presents the concept of negative numbers and shows how to add and subtract them.
- Author:
- Khan, Salman
This lesson discusses how to identify sets of numbers as natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
- Author:
- Khan, Salman
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.
- Author:
- Khan, Salman
This lesson begins a review the importance of the rule of Order of Operations.
- Author:
- Khan, Salman
This lesson discusses standard measurements of volume. Also addressed is the difference between a fluid ounce and a ounce of weight.
- Author:
- Khan, Salman
This lesson demonstrates conversion of different metric units of length in order to solve for perimeter and width of a rectangle.
- Author:
- Khan, Salman
This lesson reviews the concept of place value.
- Author:
- Khan, Salman
This lesson continues the review of the concept of place value.
- Author:
- Khan, Salman
This lesson completes the review of the concept of place value.
- Author:
- Khan, Salman
This lesson plots whole numbers, fractions, and decimals on the number line.
- Author:
- Khan, Salman
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.
- Author:
- Khan, Salman
What is the difference between a proper and an improper fraction? This lesson reviews the difference between these two kinds of fractions.
- Author:
- Khan, Salman
This lesson discusses the fraction as a ratio and shows how to write it in is simplest form.
- Author:
- Khan, Salman
This 3-minute video lesson explains how to read a bar graph.
- Author:
- Khan, Salman
This 2-minute video lesson explains how to read line graphs.
- Author:
- Khan, Salman
This 2-minute video lesson explains how to read pictographs in statistics.
- Author:
- Khan, Salman
This 3-minute video lesson explains how to read a pie chart or graph (also called a circle graph).
- Author:
- Khan, Salman
This lesson shows how to find the reciprocal of mixed numbers by converting it to a proper fraction first.
- Author:
- Khan, Salman