Problem Solving
October 26th, 2010 by julie@juliemcleod.org

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?

A 64
B 4
C 80
D 5

Tyler’s Response:

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One Response  
julie@juliemcleod.org writes:
October 5th, 2010 at 4:13 pm

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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