You don't have to but it can help with organization.
Yes
In math when you are given a negative and a positive number, you should write down the sign of the greatest number and subtract the smaller number from the greatest number. In the problem 3 - 9, three is the positive number, and nine is the negative number. This means you should write down the negative number's sign and subtract 3 from 9, and your answer should be -6.
it would be a negative multiplied by a negative and your answer should end up positive.
It should not.
Yes.
That is false. A negative times a negative is always a positive. Since absolute numbers are always positive if you make it negative that is not correct.
subtraction is merely adding a negative number, so subtracting a negative number is adding the negative of a negative number. It should be pointed out that while most people find this concept obvious, it was not obvious to ancient mathematicians. In fact, as late as the 1800s, most mathematicians thought that negative numbers were nonsense.
high
8. simples
Always.
Depend on which is larger, that will determine whether your answer is positive or negative. For example -9 + 3 = -6. Polarity (so to speak) will be the larger value.
A number with a negative exponent should be treated as the reciprocal of that same number with the analogous positive exponent. For example, 42 = 16, but 4-2 = 1/42 = 1/16.