Course 2, Lesson 27, Multiples/Least Common Multiple (LCM)/Equivalent Division Problems

Course 2, Lesson 27, Multiples/Least Common Multiple (LCM)/Equivalent Division Problems

Author: Hector Soto

1. Look for and make use of structure. 2. Look for and express regularity in repeated reasoning. 3. Solve real-world and mathematical problems involving the four operations with rational numbers. 4. Solve multi-step real-life and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically. Apply properties of operations to calculate with numbers in any form; convert between forms as appropriate; and assess the reasonableness of answers using mental computation and estimation strategies. 5. Solve real-world and mathematical problems involving area, volume and surface area of two- and three-dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms.

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Please watch BOTH videos. There are two different methods presented as shortcuts for finding the LCM (least common multiple). You should decide which method works best for you.

Multiples, LCM (Least Common Multiple), and Equivalent Division

Please pay special attention to the Factor Tree method for finding the LCM demonstrated by Ms. Ray.

Source: Deanna Ray

Multiples and LCM (Least Common Multiple)

Please pay special attention to the Division method that Ms. Borgelt uses to find the LCM.

Source: Deb Borgelt