Chapter 1 Crossword Puzzle

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Across
  1. 3. The answer to addition
  2. 7. The answer to subtraction
  3. 9. The property that states ab=ba, a+b=b+a
  4. 10. What we call the 3 in 3n
Down
  1. 1. A letter or symbol that stands for a number
  2. 2. The answer to division
  3. 4. When the denominator is 0
  4. 5. The answer to multiplication
  5. 6. What we call + – • and ÷
  6. 8. Two and 5 are _____ of 10