defination of natural numbers,whole numbers and integers.
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In mathematics, you'll see many references about numbers. Numbers can be classified into groups and initially it may seem somewhat perplexing but as you work with numbers throughout your education in math, they will soon become second nature to you. You'll hear a variety of terms being thrown at you and you'll soon be using those terms with great familiarity yourself. You will also soon discover that some numbers will belong to more than one group. For instance, a prime number is also an integer and a whole number. Here is a breakdown of how we classify numbers:
Natural numbers are what you use when you are counting one to one objects. You may be counting pennies or buttons or cookies. When you start using 1,2,3,4 and so on, you are using the counting numbers or to give them a proper title, you are using the natural numbers.
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