Multiplication Division Addition Whole numbers A prime number is a whole number, like 1, 2, 3, 4, 5, 6….. that can be evenly divided by ONLY two numbers: the number 1 and the prime number itself. Okay, maybe that's a bit hard to understand. Let's take a look at some examples: The number 5 is a prime number because it cannot be divided by any other numbers except for 5 and 1. The number 4 is not a prime number because it can be divided by 4, 2, and 1. Is the number 13 a prime number? It can't be divided by 2, 3, 4, 5, 6, 7, 8…etc. Only by 1 and 13. Yes, 13 is a prime number. Is the number 25 a prime number? It can't be divided by 2, 3, 4……true. Ah, but it can be divided by 5, so it is not a prime number. Here is a list of the prime numbers between 1 and 100: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 Take a look at a few of them and see if you can figure out any other number that they can be divided by other than the number itself or the number 1. (hint: we promise the answer is "no" and they are, therefore, prime numbers). Some tricks to prime numbers:
The fundamental theorem of arithmetic says that any number can be expressed by a unique product of prime numbers. Advanced Kids Math Subjects Statistics Mean, Median, Mode, and Range Picture Graphs Algebra Order of Operations Exponents Ratios Ratios, Fractions, and Percentages Geometry Polygons Quadrilaterals Triangles Pythagorean Theorem Circle Perimeter Surface Area Misc Prime Numbers Roman Numerals Back to Kids Math Back to Kids Study |
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