When it can be expressed as a fraction
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∙ 2012-04-17 13:02:49Yes. You can tell because there is a finite number of decimal places. 0.91 = 91/100 which is a rational number.
You probably don't have to inspect that pair too closely.Every integer IS a rational number.
a rational number repeats but terminates.ex:3.333333333. a irrational number doesn't terminate or repeat itself. ex:3.334334433444.
If the whole number is a perfect square, its square root is rational. If not, it's not.
It is not possible to tell. There is no recurring pattern that can be discerned.
It is a rational number
It is a rational number. It can be written as a fraction.
yes
It is irrational.
It is a rational number.
Is 12.05 a rational number or irrational number?
1.96 is a rational number