This Problem Set is a part of the Lesson 14, Unit 1, Grade K. In this lesson, students continue to learn about the decomposition of numbers, extended from Topic C. Using linking cubes, they create a tower of 3, counting up as they add each cube. Then students break the tower into two towers, one of 1 cube and the other of 2 cubes. Students discover that all the towers together still make 3.
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