Some subtraction strategies can only get you so far, but with a little more sophistication complex problems become really nice to think and reason about! In this episode Pam and Kim build and discuss the Constant Difference strategy for subtraction and use it to solve a really gnarly problem.
Talking Points:

Equivalence strategies are more sophisticated
Hallmarks of sophisticated stategies
Modeling Constant Difference
Relational Thinking Routine

Check out the Instructional Routine called Relational Thinking at: mathisfigureoutable.com/relational-thinking

Check out our social media
Twitter: @PWHarris
Instagram: Pam Harris_math
Facebook: Pam Harris, author, mathematics education
Linkedin: Pam Harris Consulting LLC

Ep 173: The Most Sophisticated Subtraction Strategy