Crossword Puzzle on mathematical operations

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Across
  1. 3. operation represented by the symbol "x".
  2. 5. result of adding two or more numbers.
  3. 7. that involves finding the difference between two quantities.
  4. 9. operation that combines two quantities to find a third one.
Down
  1. 1. that involves finding the result of multiplying two or more numbers.
  2. 2. that involves determining how many times one number can be subtracted from another.
  3. 4. result of dividing one quantity by another.
  4. 6. mathematical symbol indicating "less than".
  5. 8. that involves finding the total of two or more numbers.