PEMDAS & Combining like terms crossword puzzle

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Across
  1. 3. a statement that the values of two mathematical expressions are equal
  2. 4. A letter used to represent a numerical value in equations and expressions.
  3. 6. a combination of numbers, variables, functions
  4. 7. Any parts of an equation that are written inside a set of parentheses
  5. 9. an acronym for the words parenthesis, exponents, multiplication, division, addition, subtraction.
  6. 11. A mathematical operation that indicates how many times a number is added to itself.
  7. 12. the process or skill of taking one number or amount away from another.
  8. 14. Have the same variables raised to the same exponents. the order of the variables does not matter.
Down
  1. 1. A letter or number representing a numerical quantity attached to a term (usually at the beginning).
  2. 2. something that divides, separates, or marks off
  3. 5. A quantity representing the power to which a given number or expression is to be raised, usually expressed as a raised symbol beside the number or expression
  4. 8. the action or process of adding something to something else.
  5. 10. A value that does not change.
  6. 13. Piece of an algebraic equation; a number in a sequence or series; a product of real numbers and/or variables.