Since it has a finite number of decimals, it is rational. (An infinite number of decimals, that repeats regularly, is also rational - for example, 1/7 = 0.142857 142857 142857...)
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Irrational. Irrational. Irrational. Irrational.
No
Irrational
It is irrational
No. The sum of an irrational number and any other [real] number is irrational.