https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:intro-variables/v/what-is-a-variable 2023-05-23T10:28:13.689545116Z What is a variable? Variables in math are symbols, often letters, that represent different values in various situations. They help us understand and solve problems with changing values. For example, when calculating total earnings at a job with an hourly wage plus tips, a variable can represent the fluctuating tips, making it easier to determine total income. Sal Khan video https://cdn.kastatic.org/googleusercontent/Z0Ew0H4CUDZ7Hc0NbhfLe904T2e_lMEyScP69jTH-2Kcauq4mxzwzwDS-yQlWeQlDKGfOS3-podwVZQRor01fOc What is a variable? Variables in math are symbols, often letters, that represent different values in various situations. They help us understand and solve problems with changing values. For example, when calculating total earnings at a job with an hourly wage plus tips, a variable can represent the fluctuating tips, making it easier to determine total income. https://cdn.kastatic.org/ka-youtube-converted/tHYis-DP0oU.mp4/tHYis-DP0oU.mp4 198 Parts of algebraic expressions https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-evaluating-expressions/v/expression-terms-factors-and-coefficients 2023-05-23T10:28:13.689545116Z Terms, factors, & coefficients In math expressions, terms are the components added or subtracted, factors are the elements multiplied within each term, and coefficients are the numbers multiplying variables. Understanding these concepts is crucial for effective communication and problem-solving in mathematics. Sal Khan video https://cdn.kastatic.org/googleusercontent/KG5lRGcQZUigp2H158bW1ijLQDdzKlMUxoIK0s5BVctNUDeMe-EdJYcFL0XOnhybPFmgYvTs2Ab5bv_zFc08cqI Terms, factors, & coefficients In math expressions, terms are the components added or subtracted, factors are the elements multiplied within each term, and coefficients are the numbers multiplying variables. Understanding these concepts is crucial for effective communication and problem-solving in mathematics. https://cdn.kastatic.org/ka-youtube-converted/9_VCk9tWT0Y.mp4/9_VCk9tWT0Y.mp4 441 Parts of algebraic expressions https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:intro-variables/v/why-aren-t-we-using-the-multiplication-sign 2023-05-23T10:28:13.689545116Z Why aren't we using the multiplication sign? In algebra, representing multiplication with variables can be tricky due to the similarity between the variable "x" and the multiplication symbol. To avoid confusion, use alternative methods like 2⋅x, 2(x), or 2x. Practice evaluating expressions by substituting given values for variables and following the order of operations. Sal Khan video https://cdn.kastatic.org/googleusercontent/ktQxtEIS88xXcToePo4nuRJMGsrWlUaS9br45MuAwXBTu7v9IBQei-LLD-qTcmsKKL7X8KJ8ahrPC9ne2cgsdNPk Why aren't we using the multiplication sign? In algebra, representing multiplication with variables can be tricky due to the similarity between the variable "x" and the multiplication symbol. To avoid confusion, use alternative methods like 2⋅x, 2(x), or 2x. Practice evaluating expressions by substituting given values for variables and following the order of operations. https://cdn.kastatic.org/ka-youtube-converted/vDaIKB19TvY.mp4/vDaIKB19TvY.mp4 298 Parts of algebraic expressions