Mathematics crossword

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Across
  1. 1. The result of an addition.
  2. 7. Used to show really small or really large numbers.
  3. 9. Produces a sum.
Down
  1. 2. The science of number, quantity, and space.
  2. 3. A number gets cut into equal parts.
  3. 4. Has a denominator and a numerator.
  4. 5. A number is added to itself numerous times.
  5. 6. One hundredth of a number.
  6. 7. One number gets taken out of the other leaving the difference.
  7. 8. The result of a multiplication.