Click here for the free downloadable document Decomposing Fractions.
Our adopted curriculum isn't aligned with common core. I created this two page activity to show my students how to decompose fractions and write the corresponding equations.
I was surprised at how many conversations this assignment generated. As I circulated the class watching them work and listening to the discussions, I discovered several students didn't understand adding and subtracting fractions conceptually.
I used this as an informal assessment to determine who needed additional help.