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Published bySharyl Richardson Modified over 8 years ago

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**Factors & Multiples Lesson 1 - Factors & GCF**

I can list factors of a number I can find the greatest common factor of two whole numbers. Warm Up: What is a factor?

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Finding Factors Make a A factor rainbow is a way of showing factor pairings. (two whole numbers whose product is that factor) What number is each rainbow a factor for? Factor

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**Greatest Common Factor**

Example: Find the GCF of 24 and 36. Steps: 1) Make a factor rainbow for each number 2) Circle the GREATEST number that they have in common, that is your GCF.

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**Find the GCF for each pair of numbers.**

20: 36: 15: 60: 72: 56:

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**Lesson 2 – Prime Factorization**

I can make a factor tree to show prime factorization. Warm Up What is a prime number? Composite? Factor Tree Notes

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**Lesson 3 –Multiples. I can list the multiples of a whole number**

Lesson 3 –Multiples * I can list the multiples of a whole number. * I can find the least common multiple of two whole numbers. Warm Up - What is a multiple? (P. 145)

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LCM Example: Find the least common multiple of 6 and 9. Steps: 1) List the multiples of each number. Multiples of 6: 6, 12, 18, 24, 30, 36……. Multiples of 9: 9, 18, 27, 36…………….. 2) Circle the smallest number that they have in common. 18, that number is the least common multiple.

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**Practice! LCM & GCF Cheat Sheet GCF: Factor Rainbow**

Prime Factorization: Factor Tree LCM: List multiples

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