Maths key word

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Across
  1. 3. crease by addition
  2. 4. straight up and down
  3. 6. part of a whole
  4. 7. straight across from side to side
  5. 8. take away
  6. 9. A measure of the amount that must be turned when one of two intersecting
  7. 11. like removed
  8. 13. repeated addition
  9. 14. to check
Down
  1. 1. the number above in a fraction
  2. 2. side by side
  3. 5. result of addition
  4. 8. find the answer
  5. 10. to assess
  6. 12. lines overlaps the often