equation vocabulary

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Across
  1. 2. math sentence showing two expressions are equal
  2. 4. shown by a dot, parenthesis, side by side
  3. 7. operations that reverse or 'undo'
  4. 9. a number multiplied by a variable
Down
  1. 1. a value that makes an equation true
  2. 3. numbers and/or variables separated by +,-,/
  3. 5. a number on its own in an expression or equation
  4. 6. a symbol used to stand for an unknown quantity
  5. 8. math sentence with NO equal sign