Showing that matrix products are associative. Created by Sal Khan.
This lesson discusses how to identify sets of numbers as natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
This site teaches Quantities to High Schoolers through a series of 116 questions and interactive activities aligned to 4 Common Core mathematics skills.
This site teaches The Complex Number System to High Schoolers through a series of 2195 questions and interactive activities aligned to 16 Common Core mathematics skills.
This site teaches The Real Number System to High Schoolers through a series of 1090 questions and interactive activities aligned to 8 Common Core mathematics skills.
This site teaches Vector and Matrix Quantities to High Schoolers through a series of 2195 questions and interactive activities aligned to 16 Common Core mathematics skills.
To plot an inequality, such as x>3, on a number line, first draw a circle over the number (e.g., 3). Then if the sign includes equal to (≥ or ≤), fill in the circle. If the sign does not include equal to (> or <), leave the circle unfilled in. Finally, draw a line going from the circle in the direction of the numbers that make the inequality true.
This 15-minute video lesson gives an example involving the preimage of a set under a transformation. It also gives a definition of kernel of a transformation.
Examples finding probabilities from probability distributions for continuous random variables.
The addition rule for probability is explained using Venn Diagrams. [Probability playlist: Lesson 3 of 29]
This lesson introduces basic probability. [Probability playlist: Lesson 1 of 29]
This lesson is a birthday problem that determines the probability that at least 2 people in a room of 30 share the same birthday. [Probability playlist: Lesson 17 of 29]
This lesson presents an example of dependent probability. [Probability playlist: Lesson 10 of 29]
This lesson presents an example of dependent probability. [Probability playlist: Lesson 11 of 29]
This lesson begins a six part series of basic probabiltiy using module examples. [Probability playlist: Lesson 4 of 29]
This lesson demonstrates probability using combinations and shows the probability of getting exatly 3 heads in 8 flips of a fair coin. [Probability playlist: Lesson 14 of 29]
This lesson is another demonstration of probability and combinations to determine the probability of making at least 3 out of 5 basketball free throws. [Probability playlist: Lesson 15 of 29]
This lesson uses playing cards and Venn Diagrams to explain the idea of probability [Probability playlist: Lesson 2 of 29]
Proof: Any subspace basis has same number of elements. Created by Sal Khan.
How to read a pictograph and answer questions referring to the data.