a single unit
12 = 10 + 2
It is -35, exactly as in the question.
Pi, and the square root of pi, belong to a category known as transcendental numbers, which means that not only do they have an infinite decimal expansion (the numbers following the decimal go on forever) but the decimal expansion follows no pattern and is unpredictable. Irrational numbers also have an infinite decimal expansion, but not necessarily an unpredictable one.
0.75 = 3/4
In the decimal expansion of , the digit repeats indefinitely.
The decimal expansion of an irrational number is non terminating and non recurring
It is the decimal approximation to the value of the irrational number.
It is 0. As is every digit after the decimal point.
a single unit
0.125
569.384 = 71173⁄125
0.5454 repeating
It is 300 + 10 + 1.
12 = 10 + 2
It is -35, exactly as in the question.
Its decimal "expansion" is 30, as in the question. You could express it as 30.000... except that doing so would imply a greater degree of precision.