Vocabulary Crossword puzzle

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Across
  1. 2. A single number or variable
  2. 3. A letter that takes place a a value (usally unknown)
  3. 5. The number in a term
  4. 8. A math statment that contains a equal sign between two expressions
  5. 9. An expression that contains variables
Down
  1. 1. Two opperations that have a reverse effect one each other
  2. 4. A math statment that contains two expressions that aren't equal
  3. 6. A term that has the same variable raised to the same exponent
  4. 7. A value that makes a certain equation true
  5. 10. A value that doesn't change