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18 Cards in this Set
- Front
- Back
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Order of Operations
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(P) arentheses
(E) exponents (M) ultiplication (D) ivision (A) ddition (S) ubtraction |
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A number is divisible by 2 if...
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It ends in 0, 2, 4, 6, or 8.
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A number is divisible by 3 if...
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The sum of its digits is divisible by 3.
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A number is divisible by 4 if...
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The number formed by the last two digits is divisible by 4.
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A number is divisible by 5 if...
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It ends in 0 or 5.
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A number is divisible by 6 if...
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It is divisible by 2 and 3 (use the rules for both).
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A number is divisible by 7 if...
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N/A (no simple rule).
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A number is divisible by 8 if...
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The number formed by the last three digits is divisible by 8.
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A number is divisible by 9 if...
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The sum of its digits is divisible by 9.
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What is a prime number?
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A natural number greater than 1 that can be evenly divided only by itself and 1. (The first ten prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29.)
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What is a proper fraction?
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A fraction where the numerator is smaller than the denominator.
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What is an improper fraction?
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A fraction where the numerator is larger than or equal to the denominator.
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What is a mixed number?
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A term that contains both a whole number and a fraction.
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What is a factor?
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Factors of a number are those whole numbers that, when multiplied together, yield the number. (E.g., the factors of 8 are 1, 8, 2, and 4.)
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What is the greatest common factor?
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The largest factor common to two or more numbers. (E.g., the GCF of 10 and 15 is 5.)
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What is a multiple?
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Multiples of a number are found by multiplying that number by 1, by 2, by 3, by 4, and so on.
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What is the least common multiple?
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The smallest multiple that is common to two or more numbers. (E.g., the LCM of 2 and 3 is 6.)
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What is the lowest common denominator?
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The lowest number that can be divided evenly by all the denominators in the problem. (E.g., the LCD of 1/2 and 2/3 is /6.)
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