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5-4. Example 2. Lesson 2-3 Example 2. Find the GCF of 18 and 32 by using prime factors. 1. Write the prime factorization. 5-4. Example 2. Lesson 2-3 Example 2. Find the GCF of 18 and 32 by using prime factors. 2. The common prime factor is 2. So, the GCF of 18 and 32 is 2.
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