The above pictures are just examples to help students remember how to show their work. Everyone by now should know to do the inverse operation in each equation. This again means to do the opposite of the operation present in the problem. Above I put a squiggle (technical term for canceling out) over the terms that are canceled. This concept is not fully understood at this point and we will continue to work towards that. Many students are canceling because "I said so" and that is working fine for them for the time being.
When you have solved all the equations you can start putting the puzzle together. Each equation will match up to its solution like the example above shows. Upon completion all students glued their puzzle to a piece of colored paper for the math notebook.