yes
Yes.
yes
It must be a generalised rational number. Otherwise, if you select a rational number to multiply, then you will only prove it for that number.
Yes. Any rational number divided by another rational number is also rational.
15555
15555
0.15555 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is 15555/100000. You can simplify this rational fraction if required.
If that is a terminating decimal, then: 0.015555 = 15555/1000000 = 3111/200000 If that is meant to be a recurring decimal with the single digit 5 recurring: 0.01555... = ((0.01555... × 10) - 0.01555...)/(10 - 1) = (0.1555... - 0.01555...)/9 = 0.14/9 = 14/900 = 7/450
It is a rational number. It can be written as a fraction.
yes
Is 12.05 a rational number or irrational number?
1.96 is a rational number
It is a rational number, as it can be written as a fraction.
Yes, the sum is always rational.
There is no such thing as a number that is both rational and irrational. By definition, every number is either rational or irrational.
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.