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Q: Is a rational number plus a rational number always a rational number?

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Yes, the sum is always rational.

Yes, always.

Yes. In fact, a rational plus or minus an irrational will always be irrational.

No. A rational plus an irrational is always an irrational.

A natural number is always a rational number .

If both numbers are rational then x plus y is a rational number

As much as, in these days of uncertainty, anything can be anything. As long as the constraints of a rational number are kept to, a rational number will always remain a rational number.

Since the sum of two rational numbers is rational, the answer will be the same as for the sum of an irrational and a single rational number. It is always irrational.

No.A rational times an irrational is never rational. It is always irrational.

No, never.

The product of an irrational number and a rational number, both nonzero, is always irrational

It is always rational.

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