math

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Across
  1. 2. total amount
  2. 4. to separate
  3. 6. mathematics
  4. 8. less than 90
  5. 10. the space two intersecting lines
  6. 11. x
Down
  1. 1. over 90
  2. 3. 90
  3. 5. used to count
  4. 7. -
  5. 8. +
  6. 9. the equality of two expressions