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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

1. Exponents

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Exercise 26 Page 324

The prime factorization of a composite number is the number written as a product of its prime factors.

2^3* 5 * 7

Practice makes perfect

Let's start by recalling the definition of two important terms.

Term	Definition	Examples
Prime Number	A number that has exactly two positive factors, 1 and itself.	2, 3, 5, 13
Composite Number	A number that is not a prime number.	4, 12, 63

We want to write the prime factorization of 280. The prime factorization of a composite number is the number written as a product of its prime factors. We will use factor pairs and a factor tree to find the prime factorization of 280. The factor tree is complete when only prime factors appear in the product.

The prime factorization of 280 is 2* 2* 2* 3* 7 or 2^3* 5 * 7.

Subchapter links

Try It p.320-321

Self-Assessment for Concepts & Skills p.321

Self-Assessment for Problem Solving p.322

Review & Refresh p.323

Concepts, Skills, & Problem Solving p.323-324