Expressions/Equations Vocabulary

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Across
  1. 2. an expression involving at least one variable and sometimes numbers and operation symbols
  2. 5. the operation that reverses or "undoes" the effect of the other operation
  3. 6. two expressions that are equivalent
  4. 9. a number in an expression that does not change
  5. 11. an expression involving numbers and operations
  6. 15. the rules that tell which operation to perform first when more than one operation is used
  7. 16. to solve or find the value of
  8. 17. terms with the same exponent raised to the same power
  9. 19. the replacement of a variable with the known value
  10. 20. a variable that depends on other factors
  11. 21. to multiply a sum by a number, multiply each addend by the number outside the parentheses
Down
  1. 1. a variable that stands alone and is not changed by other variables
  2. 3. the way in which numbers are grouped does not change the sum or product
  3. 4. an expression that has no like terms
  4. 7. each part of an algebraic expression separated by an addition or subtraction symbol
  5. 8. a mathematical statement that includes the symbols <, >
  6. 10. the number that tells how many times the base is used as a factor
  7. 12. the order in which numbers are added or multiplied does not change the sum or the product
  8. 13. a letter or symbol used to represent a number or quantity that varies
  9. 14. a number multiplied by a variable in an algebraic expression
  10. 18. the value or values, when substituted for the unknowns, that make an equation true