Whole number & Natural number

1234567891011
Across
  1. 6. which property shows (a + b) + c = a + (b + c).
  2. 7. A number that has more than two factors.
  3. 9. A number whose factors have a sum greater than the number.
  4. 10. To find a number close to an exact amount.
  5. 11. Element: If zero is added to any whole number, the sum remains the number itself.
Down
  1. 1. The amount that remains after one quantity is subtracted from another.
  2. 2. The sum of two whole numbers is always a whole number.
  3. 3. Identity: If any whole number is multiplied by 1, the product remains the number itself.
  4. 4. Numbers that are easy to work with mentally.
  5. 5. which property shows a + b = b + a
  6. 6. Any number being added.
  7. 8. A whole number equal to the sum of its factors.