Yes. Example:
11/2 x 11/3 = 2
A mixed number can't become a whole number, unless it's something like 2 and 8/4, which no one would ever write.
Yes. -5 × 0.5 = -1 -1 is greater than -5.
To convert an improper fraction to a mixed number, divide the denominator into the numerator. The answer is the whole number. Put any remainder over the original denominator to create the fraction part.
If negative, yes. If positive, no. 6 x 1/2 = 3 -6 x 1/2 = -3
No, the product of two positive mixed numbers can never be less than one.
There is no highest whole number because they go on for ever.
No. A mixed number must be greater than 1, and two numbers that are greater than one that are multiplied together end up being greater that either number by itself.
Yes. In fact, every whole number is a rational number.
There is no least whole number: the negative counting numbers go on for ever.
You can carry out this totally pointless exercise if you divide the number by 1 and note that the remainder is 0. So, for example, 23 = 230/1. But why would anyone ever want to do that?
Because given any whole number n, n+1 is a larger whole number. And that process can go on for ever.
For any integer, there is a whole number that is bigger, and for any whole number, there is a integer that is bigger.