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Here are some tips for Prime Numbers, which aligns with Florida state standards:
Prime Numbers
This topic will be easier for you if you know your fast multiplication.
To review Fast Multipication, see here.
A prime number is a positive number that has only two factors, 1 and itself.
For example, the only factors of 5 are 1 and 5, so 5 is a prime number.
The factors of 6 are 1, 2, 3, and 6 so 6 is not a prime number.
To figure out if a number is a prime number, check to see if the number is divisible by any number besides 1 and itself.
NOTE: 1 is not a prime number.
Examples:
a. 4 The factors of 4 are 1, 2, and 4.
So 4 is not a prime number.b. 13 The factors of 13 are 1 and 13.
So 13 is a prime number.c. 21 The factors of 21 are 1, 3, 7, and 21.
So 21 is not a prime number.
Here is a list of the prime numbers under 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 |
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