It helps you not to put the wrong answer and it helps you to not write anything down.
i think divisibility rules help with fractions because it helps you reduce the fraction to make i a simple fraction.
Divisibility rules help you find the factors of a number. Once you've found the factors for two or more numbers, you can find what they have in common. Take 231 and 321. If you know the divisibility rules, you know that they are both divisible by 3, so 3 is a common factor.
Knowing the divisibility rules will help you by being able to recognize if a number has factors (other than one and itself) which are covered by the rules. This will save actually having to start doing divisions.
The divisibility rules will show that 53 is not divisible by anything other than 1 and itself. Since it is already prime, it doesn't have a factorization.
Factors of numbers are divisible by them with no remainders
they can help you by finding the two factors of the number given
The divisibility rules for a prime number is if it is ONLY divisible by 1, and itself.
26
12
You can always check on the divisibility of a number by dividing it into another number. But if you know the divisibility rules, you can get that information easier and faster.
Three
3 and 9. And they divide into 123456789 whether or not you use divisibility rules!