MATH$

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Across
  1. 4. Part of whole in maths
  2. 6. Below the fractional line
  3. 8. Above the fractional line
  4. 9. The whole longth
  5. 10. One of a thousand
  6. 11. A meet point
Down
  1. 1. The longest one of triangle
  2. 2. Three and three
  3. 3. Fraction cannot be simplified
  4. 5. The lowest edge
  5. 7. Height
  6. 12. One of ten