It is not as helpful when multiplying very small numbers because the numbers are going to be very east to answer. That is why estimating is not as helpful when multiplying very small numbers.
Chat with our AI personalities
That is not what mathematicians mean by an irrational number, which is a number with an infinitely long decimal expansion. You will note that since division is the inverse of multiplication, dividing by small numbers has the same effect as multiplying by large numbers, and so dividing by zero, which is an infinitely small number, is equivalent to multiplying by infinity. The result in most cases is deemed to have no mathematical meaning.
The short answer is, infinite. With just integers, There are 498 numbers that can round up to 500, and 498 that can round down. If we include partial numbers, there are infinite, since the numbers can get infinitesimally small.
http://primes.utm.edu/lists/small/1000.txt
No, only a small minority are whole numbers.
The significant digits in a number can be arbitrarily small or large in number, according to the method of creating them.Numbers that can have an infinite number of possible significant digits are called transcendental numbers.