Rational number

123456789
Across
  1. 3. Successor of (-34)
  2. 5. (-22-8)÷5
  3. 6. |45+(-65)|
  4. 8. Integer that has no opposite
  5. 9. Multiplicative identity in the set of integers
Down
  1. 1. Additive inverse of 23
  2. 2. The smallest positive integer
  3. 4. The set of integers is not closed under
  4. 5. 15-{-6 x (0-4)+(-8)}
  5. 7. the product of the largest negative integer and (-7)