Lesson 85 – Doodles Do Algebra

lesson85doodlegirlToday we practice with prime numbers and composite numbers in preparation for factoring.

It is not too hard, especially once your child completes the table of prime numbers less than 100 at the top of the page.

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Answers:

Primes under a 100: 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97

Prime factors of 105: 5, 3, 7

Prime factors of 210: 2, 5, 3, 7

Resolve 4290 into its prime factors: 2, 3, 5, 11, 13

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