This Problem Set is a part of the Lesson 14, Unit 5, Grade 2. In this lesson, students continue to build their conceptual understanding of subtracting numbers within 1,000. They move from concrete to pictorial representations, as they use place-value disk drawings to model decompositions while simultaneously recording these changes in vertical form. This helps them to relate the pictorial representation to the standing vertical algorithm.
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8 min(s)
5 min(s)