Math 8th crossword

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Across
  1. 2. to wrote an expression in simplest form
  2. 6. the additive identity
  3. 7. A value that does not change
  4. 9. a set of whole number and their opposites
  5. 10. a flat surface that extends forever
  6. 11. a mathematical phrase that contains separations number and/or value
  7. 12. to find the value of a numeral or algebraic expression
  8. 14. expression contains variable solution that a value need to make an equation
  9. 15. the get the variable alone or one side of an equation or inequality
  10. 16. to find the answer or solution
  11. 18. integer integer greater then zero
  12. 20. Opposite
  13. 21. a number used as a factor when a number is raised to power
  14. 22. terms to have the same variable raised to the same power
Down
  1. 1. part of a line that has an point
  2. 2. to replace a variable with its numeral value or another expression
  3. 3. mathematical sentence that show that two expressions are equal
  4. 4. equal distance from zero on a number line
  5. 5. one of the number of an ordered pair
  6. 8. the number indicates how many time the base is used as a factor
  7. 9. any number times one itself
  8. 13. Two perpendicular lines that intersect to form a coordinate plane
  9. 14. value the distance of a number
  10. 17. a number produced by raising a base to an exponent
  11. 19. a symbol used to represent a quantity that can change