Algebra Detective: Crack the Code!

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Across
  1. 1. Parts of an expression separated by addition or subtraction signs.
  2. 4. A letter or symbol used to represent an unknown value.
  3. 9. An expression with more than one term.
  4. 10. A number that tells how many times a base is multiplied by itself.
Down
  1. 2. A mathematical phrase containing numbers, variables, and operations.
  2. 3. Signs used to represent mathematical operations and relationships.
  3. 5. A mathematical sentence that shows two expressions are equal.
  4. 6. A fixed value that does not change.
  5. 7. The branch of mathematics that uses letters and symbols to represent numbers.
  6. 8. A number multiplied by a variable.