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