As promised, more notebook pages on fraction division. This is based on the work I did a while back on trying to write authentic partitive division problems with fractional divisors. (As I wrote that last sentence, I reminded myself what a bizarre niche market I am trying to occupy on this here blog.)
I settled on situations involving fractional values of unit rates, such as the following.
If of a lawn takes of an hour, how much can I mow in one hour?
Before we begin, remember that if the problem were about 2 lawns in 3 hours, we would easily and naturally divide by 3. Only the numbers have changed, so the mathematical structure remains the same and we need to find .
Click each image to see it full size. If you’re into this sort of thing.