Math terms crossword

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Across
  1. 2. The process of breaking numbers down into all their factors
  2. 6. A real number on the base ten standard numbering system
  3. 9. Substitutes letters for numbers to solve for unknown values
  4. 10. To calculate the numerical value
Down
  1. 1. A value that does not change
  2. 3. The study of shapes, lines, angles, and their properties
  3. 4. A polynomial equation with two terms
  4. 5. The sum of two or more monomials
  5. 7. A line is where two faces meet in a three-dimensional structure
  6. 8. A number that divides into another number exactly