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**Question??? What is a prime factor?**

L-1.1 Take notes on this!!!! Question??? What is a prime factor? List all of the prime numbers under 20. Make a list of the prime factors of 63.

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Divisibility Rules A number is divisible by If… 2 3 5 7

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**Finding Prime Factorization**

Find the prime factorization of 81 (factor tree) Find the prime factorization of 1125 (ladder method)

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**Check yourself!!! Do u have this?**

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**Try this one!!! Use any method**

Find the prime factorization of 1470

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**Check your notes to be sure!**

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Guided Practice Open your book to page 10 and do questions 11 and 12 right now. Show all work Use the ladder method or the factor tree method.

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Check your answers

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Check your answer

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**Solving Real World Stuff!!**

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Check your answer

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Try this one too!!

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Check the answer

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Guided Practice Do questions 13 and 14 on page 11 at this time.

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Answer check!

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Check this one!

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Homework Do L-1.1 on page 12, # all

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