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# Greatest Common Factor

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### Greatest Common Factor

1. 1. Please Prime Factorize each of the following.<br />1. 144 2. 225 3. 400<br />
2. 2. Greatest Common Factor<br />12.7.10<br />
3. 3. Key Terms:<br />·Common Factor: A whole number that is a common factor of two or more nonzero whole numbers. i.e. 4 is a common factor for 12 and 20<br />·Greatest Common Factor: The greatest of the common factors.<br />
4. 4. How do we find the GCF?<br />St. 1: Prime Factor both numbers.<br /> 24 32<br />St. 2: Write out the Prime Factorization of each.<br />St. 3 Circle and Multiply all the factors in common.<br />
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9. 9. Get your review out and develop questions for the review.<br />