Your students are going to enjoy matching up the corresponding subtraction and addition expressions to find the difference of integers. This cut n' paste puzzle makes it both fun and interesting. Trust me, this will keep your kids focused and they will also get quite a chuckle out of the riddle answer. Enjoy!
Please download the preview which includes the full activity and directions on how to complete it.
The Common Core standards is 7.NS.A.1.c, but it is certainly appropriate in other grades as well.
Understand subtraction of rational numbers as adding the additive inverse, p - q = p + (-q). Show that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in real-world contexts.
Created by Rockin' Middle School Math