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Important Math Facts

Notecards to learn important math facts for testing and life

How many inches in one foot? 12 inches in 1 foot
How many feet in one yard? 3 feet in 1 yard
How many inches in 1 yard? 36 inches in 1 yard
How many days are there in one year? 365 days in 1 year
What does "ANNUAL" mean? 1 years time
How many weeks are there in 1 year? 52 weeks in 1 year
What does "TWICE" mean? times two or x 2
What are the first 10 perfect squares? 1, 4, 9, 16, 25, 36, 49, 64, 81, 100
What are perfect squares? Number times itself two times x to second power, exponent of 2
What are Prime Numbers? Numbers that have exactly 2 factors, 1 and the number itself.
What are Composite Numbers? Numbers that have 3 or more factors
What are Whole Numbers? Numbers starting at 0 that have no decimals or fractions. examples: 0, 1, 2, 3, 4, 5, 6 . . . .
What are Natural or Counting Numbers? Whole Numbers begin at the number 1. Always start counting at 1, 2, 3, 4 . . .
What are Integers? Whole numbers that are negative, zero, and positive. Examples: . . . -3, -2, -1, 0, 1, 2, 3 . . . . .
What does DIVISIBILITY mean? A whole number is divisible by a smaller whole number when the answer is a whole number, no decimals or fractions
What are Factors? Factors are smaller numbers that divide evenly into a larger number and two factors mulitiply to equal a larger whole number. LIST factors from least to greatest
Greatest Common Factor--GCF This is the largest factor that 2 or more larger whole numbers all have the same.
How do you find EVEN numbers? Even numbers end in 0, 2, 4, 6, or 8 and are DIVISIBLE by 2. means divides evenly. 2 is a factor of an even number.
How do you find ODD numbers? Odd numbers end in 1, 3, 5, 7, 0r 9 and are NOT DIVISIBLE by 2. 2 is not a factor of an odd number.
What two whole numbers are neither prime nor composite? 0 and 1 are neither prime nor composite
What is the SMALLEST PRIME number? 2 is the smallest prime number.
What is the ONLY EVEN PRIME number? 2 is the only EVEN PRIME number.
Created by: LMCOFFMAN