Math Terms

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Across
  1. 3. {1,2,3...}
  2. 4. {}
  3. 6. must have an answer
  4. 10. {=,<,>}
  5. 12. {0,1,2,3...}
  6. 13. {x|x<3}
  7. 15. cannot be a fraction
Down
  1. 1. only one answer
  2. 2. answer after multiplying
  3. 5. includes fractions
  4. 7. answer must be in the set
  5. 8. answer after subtracting
  6. 9. {...-3,-2,-1,0,1,2,3...}
  7. 11. answer after dividing
  8. 13. answer after adding
  9. 14. both rational and irrational numbers