First we must ask ourselves, "What is 5"? according to ancient texts found in the great temple "Far' heing di mah" 5 is a unit of measurement in all things but shall be declared the 5th unit of all things in or not within measurement. This leads present day people to believe 5 is not greater nor lesser than all things.
+4 is bigger than -5
It is a bigger plus. For example, 5 - (-3) = 5 + 3 = 8
smaller
Na+is bigger
5 is bigger than 2.7
5 pounds is bigger
It depends. If the positive is bigger, than it will be positive (-5+10=5 is the same as 10-5=5). If it is smaller than the negative, it will be negative (-10+5=-5 is the same as 5-10)
4 because you are suppose to subtract and keep thesign of the bigger number
-8
Note that the reason there exists a technique called multiplication is so that we do not have to perform tedious and lengthy series of addition such as the one you have presented. So, you have given us 24 of the number 5 to add. 24 x 5 = 120. (Addition form) 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 120
Thirty
5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 55