Numbers Crossword

1234567891011
Across
  1. 4. only divisible by itself and one
  2. 5. numbers that are not real
  3. 6. a number to the left of zero
  4. 8. set of positive and negative numbers
  5. 9. these numbers start with zero
  6. 10. also called "counting numbers"
Down
  1. 1. has more than 2 factors
  2. 2. can be written as a fraction
  3. 3. pi is one
  4. 7. shorthand notation for multiplying
  5. 11. all numbers that can be written as decimals