Maths Terms - Advanced D

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Across
  1. 3. The law relating the operations of multiplication and addition, stated symbolically
  2. 4. The difference of the lowest no. from the highest
  3. 5. Substitution of letters for numbers
  4. 6. The reverse of expanding brackets
  5. 7. Equal to the difference between the upper and lower quartiles
  6. 9. The branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles
  7. 12. Something is likely to happen or be the case.
  8. 14. Equations involving two or more unknowns that are to have the same values in each equation
  9. 15. The average
  10. 16. The most frequent number
Down
  1. 1. A numerical quantity that is not a whole number
  2. 2. Navigation
  3. 3. A squared number subtracted from another squared number
  4. 8. An inclined line or a slope
  5. 10. Lines that will never meet
  6. 11. Lines that intersect at right angles
  7. 13. The middle value