Ch 1.5: Greatest Common Factor Flashcard

Front

What is the prime factorization of a number?

Back

The prime factorization of a number is the expression of that number as a product of its prime factors.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Tags

CCSS.4.OA.B.4

Front

What is a composite number?

Back

A composite number is a natural number greater than 1 that is not prime, meaning it has more than two positive divisors.

Tags

CCSS.4.OA.B.4

Front

How do you find the prime factorization of a number using a factor tree?

Back

To find the prime factorization using a factor tree, divide the number into two factors repeatedly until all factors are prime.

Front

What is the Greatest Common Factor (GCF)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder.

Front

How can Venn diagrams be used to find the GCF?

Back

Venn diagrams can show the common factors of two or more numbers, and the GCF is the product of the factors in the overlapping section.

Front

What is the ladder method for finding the GCF?

Back

The ladder method involves dividing the numbers by their common prime factors until no further division is possible, then multiplying the common factors.

Front

What is the prime factorization of 60?

Back

2 * 2 * 3 * 5.

Front

What is the prime factorization of 90?

Back

2 * 3 * 3 * 5.

Front

What is the prime factorization of 56?

Back

2 * 2 * 2 * 7.