Kasen,s crossword

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Across
  1. 5. a portion of something
  2. 6. a quantity that doesn’t change
  3. 8. the middle
  4. 9. a relationship where each input has exactly one output
  5. 10. what is being used in this. 1+1
  6. 12. a numerical factor in a term that has a variable
  7. 13. the set of all input values for a function
Down
  1. 1. finding the difference between two numbers
  2. 2. a mathematical statement
  3. 3. the average of something
  4. 4. the value the appears most frequently
  5. 7. a symbol
  6. 8. a lot of something
  7. 11. it can be a percentage of something
  8. 13. the opposite of multiplication