This Problem Set is a part of the Lesson 12, Unit 5, Grade K. In this lesson, students work with numbers 11-19 to gain foundations for place value. They show, count, and write the numbers 11 to 20 in tower configurations decreasing by 1 to deepen their understanding of the composition and decomposition of teens as 10 ones and some more ones. Students count to answer "how many?"
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3 min(s)
