This Problem Set is a part of the Lesson 20, Unit 3, Grade 2. In this lesson, students continue to use place-value disks and sentence frames, e.g., "10 more than ___ is ___," to model more than and less than by groups of 1, 10, or 100. They practice doing this with numbers that require to change the hundreds place (e.g, 10 less than 503 is 493).
