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# Fast Math Facts

### How to learn MATH FASTER and MORE FUN!

TermDefinition
Divisibility rule for 2 If a number is even
Divisibility rule for 3 If the sum of digits is divisible by 3
Divisibility rule for 4 If the last two digits are divisible by 4
Divisibility rule for 5 If number ends in 0 or 5
Divisibility for 6 Short Version If number is even and is divisible by 3
Divisibility rule for 9 If sum of digits is divisible by 9
Divisibility rule for 10 If last digit ends in 0
Exponents Tells us how many times the base is used as a factor
Base The number that we are multiplying
Power When we are multiplying a base times an exponent
Prime Number Has only two factors, 1 and itself
Composite Number Has more than two whole number factors
Prime Factorization Taking a composite whole number and breaking it down into its prime factors
Factors The numbers that we multiply
Equivalent Fractions Name same amount; equal
Numerator Tells us the number of parts being asked about
Denominator Total number of equal parts
Facts #1 1. When listing factors, you should never have a factor that is greater than the initial number. 2. Every even number that is greater than 2 is composite. 3. One is neither prime nor composite. 4. Divisibility rules help make division easier.
Facts #2 5. They help us know if we will or will not have a remainder when dividing. 6. When listing the multiples of a number you should NEVER have a multiple less than that number.
Multiple The product of a number when multiplied by a counting number.
Least Common Multiplfe The smallest number.
Fact #3 7. You're never going to be asked the least common factor and the greatest common multiple because 1. The number would be 1 & 2. Numbers are infinant.
Divisibility Rule for 6 Long Version If the number is even and the sum of the digits is divisible by 3, then the number is divisible by 6.
Created by: mjys02