Mathematics flip learning

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Across
  1. 2. numbers starting from 0 1 2 3.....
  2. 3. number zero is also known as
  3. 5. The rational number whose multiplicative inverse does not exist
  4. 6. numbers starting from 1 2 3.....
  5. 8. any number that can be written as a fraction using two integers is known as
  6. 9. rational numbers with the same value
Down
  1. 1. a fraction upside down
  2. 3. a property which states the grouping of numbers in a different way does not change the sum/product
  3. 4. rational numbers can be represented on a
  4. 7. Sum of additive identity and multiplicative identity