Goal: Think like a mathematician! Build the mathematical habits of interpreting, deciding and defending.
Students are working with base-ten blocks. Lamar wants to make the number 261. He has plenty of hundreds blocks and ones blocks to work with, but only 4 tens blocks. His friend Jose said,
You can still make 261 with the blocks you have.
Source: Illustrative Mathematics
Additional Resources: Achieve the Core
Decide and Defend Jose’s Claim Slides
Decide and Defend Jose’s Claim Handout
Back to Decide and Defend Tasks