Essentially that while you could clearly see (or imagine) 3 apples, seeing or even imagining -3 apples was not possible. It was a reflection of poor imagination!
Closure of the set of numbers under subtraction or, equivalently, the existence of additive inverses.
Arguments using numbers to prove their point.
There is an infinite amount if numbers in existence.
The product of three negative numbers is negative.
They will be negative numbers as for example -5+(-7) = -12
No. Whole numbers are counting numbers and zero.
The product of three negative numbers is negative.
Where do we see negative numbers
Yes, the mean of a set of negative numbers is always negative. The mean is calculated by summing all the numbers and then dividing by the count of numbers. Since all the numbers in the set are negative, their sum will also be negative, resulting in a negative mean.
It belongs to the set of negative rational numbers, negative real numbers, fractionall numbers, rational numbers, real numbers.
No, not all negative numbers are rational. There are many negative numbers that are irrational, just like the positive numbers.
What do I know about negative numbers? A lot.