Khan Academy: Basic Set Operations: Subset, Strict Subset, and Superset

Please Excuse My Dear Aunt Sally - or whichever mnemonic your students use for the order of operations - is the focus of this video. Sal takes viewers through various mathematical equations which require the use of the order of...

A video showing working with sets.

A video about the union and intersection of sets. [7:44]

An introduction of Universal Sets and Absolute Complement.

Adding and subtracting matrices.

Practice evaluating expressions using the order of operations. Numbers used in these problems may be negative. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice solving more challenging problems using the order of operations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice evaluating expressions using the order of operations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This video introduces the concept of order of operations with several examples.

This video demonstrates the order of operations in a numerical expression.