Math

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Across
  1. 2. horse shoe method
  2. 4. we have it on Friday
  3. 6. starts at 2 ends at ∞
  4. 8. M?={...}
  5. 11. +
  6. 13. -
Down
  1. 1. starts at 0 ends at ∞
  2. 3. starts at 1 ends at ∞
  3. 5. x
  4. 7. 12:15
  5. 9. 0,9
  6. 10. ➗
  7. 12. starts at 1 ends at ∞