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What are natural numbers and their examples?
Natural numbers are positive integers, also known as counting numbers. Some examples are 3, 4, 4359.
Why is the set of positive whole numbers closed under subtraction?
The set of positive whole numbers is not closed under subtraction! In order for a set of numbers to be closed under some operation would mean that if you take any two elements of that set and use the operation the resulting "answer" would also be in the original set.26 is a positive whole number.40 is a positive whole number.However 26-40 = -14 which is clearly not a positive whole number. So positive whole numbers are not closed under subtraction.
What are positive and negative whole numbers and zero?
Whole numbers are numbers from 0 to infinity. They must be numbers that are not fractions or decimals, and must be positive. Integers can be any numbers that are whole, negative or positive. Zero is not a positive number. Neither is it negative. Rational numbers are an fraction. Eg: 6/10 or 6/6 They can also be whole numbers because 6/6 is also 1. Counting numbers are also numbers 1-infinity, but once again, it is all whole numbers, meaning that they are not decimals or some thing like: .1 or 1/2
Are negative integers considered whole numbers?
It depends. Some authors consider "Whole Numbers" to be the positive integers, some consider them to be the non-negative integers, and some consider them to be all integers. For the first two definitions, numbers like -3 would not be considered "whole numbers". With the last definition, negative numbers like -3 would be considered a "whole number".
Are rational numbers is a whole number?
Some rational numbers are whole numbers, some are not. The set of whole numbers is a proper subset of rational numbers.
