Using letters
Distinguish unknowns, variables, and constants and express quantity relationships with letters.
Meaning
Letters represent unknown or varying numbers. The context determines what varies and what stays fixed.
Example
Practice for this concept
Scope and references
Topics
Unknowns, variables, constants, representing quantities with letters
Learning goal
Distinguish unknowns, variables, and constants and express quantity relationships with letters.
Helpful background
Express numerical relationships in words and equations.
Using variables
These ordinary choice questions provide limited practice in this concept. They do not establish independent solution, full-concept performance, or mastery.