Warm Up Problems. LESSON 1-1 PART 1 Factors and Multiples.

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Presentation transcript:

Warm Up Problems

LESSON 1-1 PART 1 Factors and Multiples

Objectives I can find the greatest common factor (GCF) of 2 or more numbers.

Vocabulary Greatest Common Factor (GCF) – the greatest number that is a factor of two or more numbers

Cakes TypeNumber of Servings Marble10 Red velvet15 Chocolate20 Example 1 1. There are one-slice servings of three types of cake on a table. Each row has an equal number of servings and only one type of cake. What is the greatest number of servings in each row? To solve this problem, use common factors. Factors of 10: 1,2,5,10 Factors of 15: 1, 3, 5, 15 Factors of 20: 1, 2, 4, 5, 10, 20 The GCF of 10, 15, and 20 is 5. So, the greatest number of pieces of cake that can be placed in each row is 5.

Got It? a. Lana earned $49 on Friday, $42 on Saturday, and $21 on Sunday selling bracelets. She sold each bracelet for the same amount. What is the most she could have charged for each bracelet?

Example 2 Find the GCF of 12 and 18. Factors of 12: 1, 2, 3, 4, 6, 12 Factors of 18: 1, 2, 3, 6, 9, 18 GCF: 6.

Got It? Find the GCF for each problem. b. 12, 66 c. 18, 30 d. 32, 48