Maths crossword puzzle

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Across
  1. 3. the type of number including 0 and ahead
  2. 5. number that divides another number exactly
  3. 6. answer to a multiplication problem
  4. 7. the type of numbers which we use
  5. 8. 3d figure with six faces
  6. 9. operation to find total of numbers
Down
  1. 1. we have 4 of these in maths, and our basic for problem solving
  2. 2. number that is result of multiplying by itself
  3. 4. fraction when numerator is greater than denominator
  4. 6. value of digit depending on its position