1. Splash Screen

2. Lesson Menu Five-Minute Check (over Lesson 9–1) Main Idea and Vocabulary Example 1:Use Models Example 2:Use Factor Pairs Example 3:Find the Prime Factorization of a Number

3. Main Idea/Vocabulary I will identify prime and composite numbers. prime factorization

4. Example 1 Use Models Tell whether the number 14 represented by the model is prime or composite. The model shows 2 rows of 7 squares. The squares could also be arranged in 7 rows of 2 squares, 14 rows of 1 square, or 1 row of 14 squares, as shown below. Answer: So, the number 14 is a composite number because it has more than 2 factors.

5. Example 1 Tell whether the number 8 represented by the model is prime or composite. 1.A 2.B A.prime B.composite

6. Example 2 Use Factor Pairs 19 square tables are to be placed together to form a rectangle. Is 19 a prime or composite number? What does it mean in this problem? factors of 19: 1, 19 Answer: Since the number 19 only has two factors, it is a prime number. This means there is only one way to place the tables.

7. 1.A 2.B Example 2 A.prime B.composite 24 tables are to be placed together to form a rectangle. Is 24 a prime or composite number?

8. Example 3 Find the Prime Factorization of a Number Find the prime factorization of 54. 54 2 × 27 2 × 3 × 9 2 × 3 × 3 × 3 54 3 × 18 3 × 3 × 6 3 × 3 × 3 × 2 Answer: In order, the prime factorization of 54 is 2 × 3 × 3 × 3.

9. 1.A 2.B 3.C 4.D Example 3 A.2 × 3 × 3 B.2 × 2 × 3 × 9 C.3 × 3 × 3 × 3 D.9 × 9 Which shows the prime factorization of 81?

10. End of the Lesson End Lesson

11. Resources Five-Minute Check (over Lesson 9–1) Image Bank Math Tool Chest Compare Fractions

12. 1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 9–1) A.1, 2, 3, 6, 9 B.1, 2, 3, 4, 6, 9 C.1, 2, 3, 6 D.6, 9 Find the common factors of 12 and 18.

13. 1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 9–1) A.1, 2, 4 B.1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14 C.1, 2, 3, 4, 6, 12, 14 D.2, 4 Find the common factors of 20, 24, and 28.

14. 1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 9–1) A.4 B.5 C.3, 5 D.1, 5 Find the GCF of 15 and 20.

15. 1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 9–1) A.1, 3, 4, 6, 7 B.3 C.1, 7 D.7 Find the GCF of 21, 28, and 35.

16. End of Custom Shows