Maths crossword puzzle

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Across
  1. 3. Result of multiplication
  2. 4. One of the basic operations of arithmetic
  3. 6. A number by which another number is to be divided
  4. 8. A number that comes after a given number
  5. 9. The study of numbers
  6. 10. Parts of a whole
Down
  1. 1. A number that divides another number evenly
  2. 2. A number that comes before a given number
  3. 5. The number that is being divided in division
  4. 7. the number resulting from the division of two numbers