I attempted two problems, first 43x9 and then 87/5.
I enjoy the method for multiplication and find it easy to double so the process goes fairly quickly. With the division problem, I ended up with 17.5 instead of 17.4. I think this is because we "ignore" halves so we don't get the precise decimal. I tried it another way but I got 18. I think the division method does not work as well as the multiplication method likely because there was not necessarily an understanding of a system for irrational numbers or use of certain fractions.
Hi Christine, lovely to read your thoughts on this! Would you still potentially have students engage in an activity around division despite it not working as well?
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