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Divisible

a number is divisible by another number if the quotient is a whole number and the remainder is zero

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Common Factor

a number that is a factor of two or more numbers

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Greatest Common Factor

the greatest factor that two or more numbers have in common

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Composite Number

a whole number having more than two factors

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Prime Factorization

a number written as the product of all its prime factors

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Factor Tree

a diagram that shows the prime factors of a number

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Ladder diagram

a diagram that shows the steps of repeatedly dividing by a prime number until the quotient is 1

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Associative Property of Addition

the property that states that when the grouping of addends is changed, the sum is the same

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Commutative Property of Addition

the property that states that when the order of two or more addends is changed, the sum is the same

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Least Common Multiple (LCM)

the smallest number, other than zero, that is a common multiple of two or more numbers

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Least Common Denominator (LCD)

the least common multiple of two or more denominators

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Benchmark

a familiar number used as a point of reference

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Round

to replace a number with one that is simpler and is approximately the same size as the original number

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Tenth

one of ten equal parts

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Hundredth

one of one hundred equal parts

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Estimate

to find a number that is close to an exact amount

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