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Is ZERO considered a number?
Yes, zero is considered a number. It represents the absence or lack of quantity. It is often used as a placeholder and has its own mathematical properties and operations.
Is x-x a variable expression?
Yes. It is equal to zero. Yes, mathematical expressions can contain numbers, variables, and mathematical operations but do not contain an equal sign or inequality sign.
Why zero in front of decimal?
While writing the point (period symbol) may not be legible and so zero is added. It is still possible to have an illegible point (period sign). Just another safety mechanism. Also used to line up digits during mathematical operations.
Why don't we use roman numarels always?
We still do use Roman numerals to a limited extent but nowadays Hindu-Arabic numerals are used almost world wide because they contain a zero symbol thus making mathematical operations a lot easier whereas Roman numerals have no zero symbol as such which makes mathematical operations a lot more difficult.
What are disadvantages of roman numerals?
Using them for mathematical operations is very complicated, and sometimes impossible. When dealing with large numbers, roman numerals tend to be very long. There is no zero.
