I was a little confused in the proof of Lemma 9.26 with all the multiplication that was going on. They didn't explain WHY they were doing anything, so it was harder for me to make the logical connections and understand the logic behind the proof.
Reflective:
I mostly just thought it was cool to see these equivalence relations. I hadn't ever really thought about why 1/2 =2/4 and so on and so forth. This is the kind of thing students in junior high and high school get confused about, and as a math ed major, it's cool to see an explanation.
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