Big Ideas Chapter 1

Front

What is the Least Common Multiple (LCM)?

Back

The LCM of two or more numbers is the smallest number that is a multiple of each of the numbers.

Front

How do you find the LCM of 9 and 24?

Back

The LCM of 9 and 24 is 72.

Front

What is prime factorization?

Back

Prime factorization is expressing a number as the product of its prime factors.

Front

How do you create a factor tree for the number 28?

Back

Start by dividing 28 by the smallest prime number (2): 28 = 2 x 14, then divide 14 by 2: 14 = 2 x 7. The prime factorization is 2 x 2 x 7.

Front

What are prime numbers?

Back

Prime numbers are natural numbers greater than 1 that have no positive divisors other than 1 and themselves.

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11.

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.

Front

Is 28 a prime or composite number?

Back

28 is a composite number because it has divisors other than 1 and itself.

Front

What is the prime factorization of 28?

Back

The prime factorization of 28 is 2 x 2 x 7.

Front

What is the significance of the bottom row in a factor tree?

Back

The bottom row of a factor tree shows the prime factors of the original number.