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http://www.marilynburnsmathblog.com/what-is-5-divided-by-4-so-many-answers/feed/5Algorithms Are Not Enough!
http://www.marilynburnsmathblog.com/algorithms-are-not-enough/
http://www.marilynburnsmathblog.com/algorithms-are-not-enough/#commentsTue, 19 Feb 2019 15:37:36 +0000http://www.marilynburnsmathblog.com/?p=2827 Last year, I agreed to meet with a friend’s sixth-grade son. Oscar’s math teacher had raised an alarm for my friend and her husband about Oscar’s math progress. They were shocked. Oscar did his homework and was proficient with paper-and-pencil math. What was the problem? ]]>http://www.marilynburnsmathblog.com/algorithms-are-not-enough/feed/12When You Multiply by 10, Just Add a Zero? Horrors!?!
http://www.marilynburnsmathblog.com/when-you-multiply-by-10-just-add-a-zero-horrors/
http://www.marilynburnsmathblog.com/when-you-multiply-by-10-just-add-a-zero-horrors/#commentsMon, 01 Oct 2018 17:20:58 +0000http://www.marilynburnsmathblog.com/?p=2678 Have you ever asked students to solve 12.6 x 10, and they respond that the answer is 12.60? I have, many times. Students who do this apply a pattern that works when they multiply whole numbers by 10—they tack on a zero to the end of the number they’re multiplying. But then they apply the same pattern when working with decimals. What can we do? ]]>http://www.marilynburnsmathblog.com/when-you-multiply-by-10-just-add-a-zero-horrors/feed/98Can 1/3 + 1/3 = 2/6? It seemed so!
http://www.marilynburnsmathblog.com/can-1-3-1-3-2-6-it-seemed-so/
http://www.marilynburnsmathblog.com/can-1-3-1-3-2-6-it-seemed-so/#commentsThu, 22 Mar 2018 23:15:52 +0000http://www.marilynburnsmathblog.com/?p=2616 I thought I was on the right teaching track using real-world contexts to talk about fractions with a class of fourth and fifth graders. Then a surprise occurred! I’m still mulling over what I could have done. I’d love your thoughts.