Instructional Activity# Squares and Rectangles

Lesson 2. Unit 5. Grade 6 Open Up Resources

Open Up Resources15 min(s)

This Instructional Activity is a part of the Lesson 2, Unit 5, Grade 6. In this activity, students reinforce their understanding of the meaning of place value, i.e., that the value in ones place is 10 times the value of the place to its right. They draw base-ten diagrams to represent addition of decimals; they connect the process of regrouping numbers in the addition algorithm to the "bundling" of pieces in the diagram. For example, they see that 10 medium squares (0.01) can be composed or "bundled" to make 1 medium rectangle (0.1).