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 Introduction to Algebra https://www.khanacademy.org/math/revision-term-1-up-math-class-6/x12e32098b1dd242b:week-2/x12e32098b1dd242b:algebraic-concepts/e/algebraic-concepts-5-d 2025-03-18T09:48:54.954250084Z Constants and variables Algebraic concepts ashish exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-writing-expressions/v/writing-expressions-with-variables-examples 2023-05-23T10:28:13.689545116Z Writing basic expressions with variables Learn to write expressions with variables in math! Discover how to represent various operations like addition, subtraction, multiplication, and division using variables. Master the art of creating expressions for real-life situations, such as finding the sum of two numbers or the difference between two values. Boost your algebra skills and become a pro at handling variables! video https://cdn.kastatic.org/googleusercontent/NHMBrf4eBm7Vw1GgYB04Y8Ofe8Ou5JROQgdkLmx95u6MawZgVsFiah9vhMAAhdmNu-D5HjurARYHf0E-UxaqdvJW4Q Writing basic expressions with variables Learn to write expressions with variables in math! Discover how to represent various operations like addition, subtraction, multiplication, and division using variables. Master the art of creating expressions for real-life situations, such as finding the sum of two numbers or the difference between two values. Boost your algebra skills and become a pro at handling variables! https://cdn.kastatic.org/ka-youtube-converted/640-86yn2wM.mp4/640-86yn2wM.mp4 157 Introduction to Algebra https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-writing-expressions/e/writing_expressions_1 2025-02-10T05:04:39.155459793Z Writing expressions with variables Practice writing algebraic expressions to match verbal descriptions of mathematical operations. John Resig exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-alg-expression-word-problems/v/writing-basic-expressions-from-word-problems-examples 2023-05-23T10:28:13.689545116Z Writing basic expressions word problems Susie runs a race at 5 miles per hour for t hours. To find the distance, multiply her speed by time (5t). In a poker game, winnings are split among p players, so each gets $548/p. Phil's net winnings are x dollars minus the $100 entry fee. Hillary makes 48 chocolate chip cookies and y sugar cookies, totaling 48+y cookies. video https://cdn.kastatic.org/googleusercontent/LTneQe3n2GCHAys0Gopnglwq20j02E7fNmKWORot7VfK9egqB54NgcJNFoDp3Ab3tuHaLnUorA5j8M8K4Cv6Bk-T Writing basic expressions word problems Susie runs a race at 5 miles per hour for t hours. To find the distance, multiply her speed by time (5t). In a poker game, winnings are split among p players, so each gets $548/p. Phil's net winnings are x dollars minus the $100 entry fee. Hillary makes 48 chocolate chip cookies and y sugar cookies, totaling 48+y cookies. https://cdn.kastatic.org/ka-youtube-converted/lq-2gX3NKCM.mp4/lq-2gX3NKCM.mp4 189 Introduction to Algebra https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-alg-expression-word-problems/e/writing-expressions-with-variables-word-problems 2021-06-30T17:51:14Z Writing basic expressions word problems Practice writing basic algebraic expressions to model real-world situations. allytobias exercise https://www.khanacademy.org/math/class-6-od/xc64d76c04ac22b26:introduction-to-algebra-odia/xc64d76c04ac22b26:exponent-of-variables-and-constants-odia-class-6/v/exponents-of-variables 2025-07-22T05:50:14.600314614Z Exponents of variables In this video, we break down the basics: what is a base, what is an exponent, and how they work together to form exponential expressions. Learn how to express numbers and variables in exponential form, whether it's squaring a number, cubing it, or extending to higher powers. With easy-to-follow examples, you'll grasp how exponentiation makes calculations efficient and lays the foundation for advanced math concepts. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Exponents of variables In this video, we break down the basics: what is a base, what is an exponent, and how they work together to form exponential expressions. Learn how to express numbers and variables in exponential form, whether it's squaring a number, cubing it, or extending to higher powers. With easy-to-follow examples, you'll grasp how exponentiation makes calculations efficient and lays the foundation for advanced math concepts. https://cdn.kastatic.org/ka-youtube-converted/3Bwq4nXaNno.mp4/3Bwq4nXaNno.mp4 220 Introduction to Algebra 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 Introduction to Algebra https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:expressions-using-letter-numbers/x063f95a40c290960:omission-of-the-multiplication-symbol-in-algebraic-expressions/e/algebraic-expressions-6-a 2025-03-18T09:48:54.954250084Z Terms and coefficients Algebraic expressions ashish exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-evaluating-expressions/e/identifying-parts-of-expressions 2026-03-15T17:11:10.340789021Z Parts of algebraic expressions Practice identifying the following parts of algebraic expressions: sum, product, quotient, coefficient, factor, term, and variable.  allytobias exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratics-multiplying-factoring/x2f8bb11595b61c86:multiply-monomial-polynomial/v/polynomials-intro 2025-10-15T19:00:54.271698668Z Polynomials intro This introduction to polynomials covers common terminology like terms, degree, standard form, monomial, binomial and trinomial. Polynomials are sums of terms of the form k⋅xⁿ, where k is any number and n is a non-negative integer. For example, 3x+2x-5 is a polynomial.  1. Hello Fren video https://cdn.kastatic.org/ka_thumbnails_cache/91aa542f-c981-4cbf-a28f-1ed4953978dc_1280_720_base.png Polynomials intro This introduction to polynomials covers common terminology like terms, degree, standard form, monomial, binomial and trinomial. Polynomials are sums of terms of the form k⋅xⁿ, where k is any number and n is a non-negative integer. For example, 3x+2x-5 is a polynomial.  https://cdn.kastatic.org/ka-youtube-converted/Vm7H0VTlIco.mp4/Vm7H0VTlIco.mp4 648 Introduction to Algebra https://www.khanacademy.org/math/grade-6-math-cambridge/x1977d7ef0ed7ac14:algebra/x1977d7ef0ed7ac14:polynomials/e/types-of-polynomial-2 2026-02-26T15:40:49.311158104Z Classify polynomials based on terms Classify polynomials based on terms ashish exercise https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:expressions-using-letter-numbers/x063f95a40c290960:simplification-of-algebraic-expression-part-1/e/algebraic-expressions-6-b 2025-02-10T11:15:42.866710478Z Like and unlike terms Algebraic expressions ashish exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:combine-like-terms/v/combining-like-terms 2023-06-14T19:01:04.581019455Z Intro to combining like terms Adding like terms is a fundamental concept in algebra. Coefficients are the numbers in front of variables, and they can be added when the variables are the same. For example, 2x + 3x equals 5x. When dealing with different variables, such as x and y, add them separately, resulting in expressions like 5x + 9y. Sal Khan video https://cdn.kastatic.org/googleusercontent/VTr15zetlK01KWaaEfOgeL6wIBxyTVD9Nzj5J6jqClaaKhwqSR549sg3nEHteDUAtqN_ZcmmF_lVtlPfPzjP7L4T Intro to combining like terms Adding like terms is a fundamental concept in algebra. Coefficients are the numbers in front of variables, and they can be added when the variables are the same. For example, 2x + 3x equals 5x. When dealing with different variables, such as x and y, add them separately, resulting in expressions like 5x + 9y. https://cdn.kastatic.org/ka-youtube-converted/CLWpkv6ccpA.mp4/CLWpkv6ccpA.mp4 273 Introduction to Algebra https://www.khanacademy.org/math/up-class-9-bridge/x27a9f6658c8b5c27:algebraic-expressions/x27a9f6658c8b5c27:untitled-14/e/b7-like-and-unlike-terms 2025-03-18T09:48:54.954250084Z Simplification using like terms Like and unlike terms ashish exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:substitute-evaluate-expression/v/evaluating-expressions-in-two-variables 2023-05-23T10:28:13.689545116Z Evaluating expressions with two variables Evaluating expressions with multiple variables involves substituting given values for each variable and simplifying the expression. By replacing variables with their corresponding values, we can easily compute the result of expressions, even for more complex examples with multiple terms and operations. Sal Khan video https://cdn.kastatic.org/googleusercontent/iq0X7eHKRMR7hfRc9mv4FyGygVfST6BBHqCNP68H6jRMR_bZ7vvnI1IxdP9ixbNILdvxF4YpfpS7SiGx7vtfzQSx Evaluating expressions with two variables Evaluating expressions with multiple variables involves substituting given values for each variable and simplifying the expression. By replacing variables with their corresponding values, we can easily compute the result of expressions, even for more complex examples with multiple terms and operations. https://cdn.kastatic.org/ka-youtube-converted/S_OX3ByvBSc.mp4/S_OX3ByvBSc.mp4 125 Introduction to Algebra https://www.khanacademy.org/math/up-class-9-bridge/x27a9f6658c8b5c27:algebraic-expressions/x27a9f6658c8b5c27:untitled-14/e/b7-value-of-algebraic-expressions 2025-03-18T09:48:54.954250084Z Value of algebraic expressions Value of algebraic expressions ashish exercise https://www.khanacademy.org/math/class-6-od/xc64d76c04ac22b26:introduction-to-algebra-odia/xc64d76c04ac22b26:evaluating-algebraic-expressions-odia-class-6/e/exponents-of-variables 2025-05-22T15:16:12.691169048Z Exponents of variables Exponents of variables Ashish Gupta exercise