This Instructional Activity is a part of the Lesson 19, Unit 2, Grade 6. The Opening Exercise was meant to recall how to determine the quotient of two numbers using long division. You have practiced the long division algorithm many times. Today's lesson is inspired by Euclid, a Greek mathematician who lived around 300 B.C. He discovered a way to find the greatest common factor of two numbers that is based on long division.
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