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81*81 is rational. Rational numbers are numbers that can be written as a fraction. Irrational Numbers cannot be expressed as a fraction.

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11y ago
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13y ago

Rational.

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Q: Is -81 is rational or irrational?
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Related questions

Is 39.81 with a line over 81 irrational?

No, it is rational.


Is 9 squared rational or irrational?

81 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.


Is the root of 81 an irrational number?

No. The square root of 81 is 9, which is a rational number.


Is -81 an irrational number?

No, -81 is not an irrational number because it can be represented in the form x/y = -81


Is sqrt 81 a irrational number?

No because the square root of 81 is 9 which is a rational number


Is the square root of -81 rational or irrational?

Since it is the square root of a negative number, it is actually imaginary, neither rational nor irrational. It is equal to 9i, or 9 times whatever the square root of negative one is.square root of -81 = square root of 81 times i = 9i


Is 81 a irrational number?

No. 81 is a rational number. An irrational number is a number with an endless amount of digits like pi or the square root of 2.


Is 81 a rational or irrational number?

81 as well as all whole numbers are rational numbers. Any number that can be written as a fraction is a rational number. An irrational number can be written as a decimal, but not as a fraction. An irrational number has endless non-repeating digits to the right of the decimal point. An example of an irrational number would be pi: π = 3.141592…


Is 4.6 irrational or rational?

4.6 is rational.


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10.01 is a rational number


Is 37.5 a rational or irrational number?

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Is 34.5 rational or irrational?

is 34.54 and irrational or rational. number