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Is the number 9+10-9 + 10 rational or irrational?

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Q. Is the number 9+10-9 + 10 rational or irrational?
  1. Evaluate 9+10-9 + 10: Evaluate 9+10-9 + 10.9+10=1-9 + 10 = 1
  2. Identify number type: Identify whether 11 is a rational or irrational number.\newline9+10=1-9 + 10 = 1\newline11 is a rational number because it can be expressed as a fraction 11\frac{1}{1}, where both the numerator and the denominator are integers.

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