SIMPLIFICATION PUZZLE

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Across
  1. 2. are terms that have the same variables and powers.
  2. 3. whole-valued positive or negative number.
  3. 7. is number used to multiply a variable.
Down
  1. 1. is a changing number.
  2. 4. Numbers, symbols and operators (such as + and ×) grouped together that show the value of something.
  3. 5. a number that has a fixed value.
  4. 6. to reduce to basic essentials.