Math crossword puzzle

12345678910111213
Across
  1. 1. value- a digit depending on a number
  2. 6. part of a group number or whole
  3. 8. number- a number below zero
  4. 9. it is an imperial unit for measuring lengths
  5. 10. a visual that is used to represent information
  6. 11. metric unit for measuring length
  7. 13. the height when you are above something
Down
  1. 2. a distance from one end to another
  2. 3. one out of four of the same parts
  3. 4. the bottom of something in math
  4. 5. metric for measuring mass or weights
  5. 7. the distance around an object
  6. 12. a line that goes through the center of something