Ms. Meléndez needs to replace the batteries in 20 calculators. Each calculator uses 4 batteries. The batteries are sold in packages of 16. How many packages of batteries does Ms. Meléndez need to buy?
In our private class blog, students comment on each others’ strong mathematical thinking based on co-created criteria. Students also look for their own strong mathematical thinking. Here are the posts for Tyler’s mathcast:
Jay said, “I notice when when you was figering out what all you were doing and when you wrote down the numbers in the book and then muitply 20 and 4 and got 80 and when you divided 80 and 5 and got 16. ”
Tyler said, “I noticed my own strong mathematical thinking was me working out the whole problem, writing down my answer chioces(even if I was a little late on that part), and me checking my work.”
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