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Can a decimal number be a whole number?
No. A whole number is a number with no fractional (decimal) part. Therefore a decimal number can not be a whole number. Another view: 35.0 is a whole number AND a decimal. The fact that a number is a decimal does not automatically require it to have a fractional part. Even 35 is a decimal number (without a decimal point).
Is -3.2 an integer why?
No. Any number that has a decimal place is not an integer. Even if the decimal place is ".0".
Is 7 over 5 as a fraction a rational or irrational number as a decimal?
If the decimal number can be expressed as a fraction (with one whole number over another), then it is a rational decimal number. So 7/5 is a rational number, and remains as such even if expressed in decimal form (of 1.4).
Is zero the first even number?
Depends on what you mean. The first even number can be 0.2 or lesser. If you do not include decimal points, then I think zero is the first even number.
Is -98 a whole number?
Yes - any number without a decimal portion - even a negative number - is a whole number.
