What’s the mistake? Why this mistake in particular?
Thanks again to Louise Wilson for the submission.
What’s the mistake? Why this mistake in particular?
Thanks again to Louise Wilson for the submission.
The student clearly needs more practice with solving equations. Fine. But why did the student make this mistake, in particular? After all, there are dozens of ways to mess up this problem. Why was this way tempting?
Today’s submissions comes Louise Wilson, who blogs over at Crazed Mummy.
The submitter of this mistake reports that the student is a “high flyer.”
Thanks to Jeff de Varona for the submission. Go check out his blog and follow him on twitter.
This post is brought to you by David Wees. Thanks, David!
Why is this mistake so enticing, and how might you help students avoid it?
[Compare: http://mathmistakes.org/?p=396]
Thanks again to Anna Blinstein for the submission. Follow her! Virtually! Not literally!
What’s the mistake? Diagnose the disease, and find the cure in the comments.
Thanks to Anna Blintsein for the submissions. Go follow her on twitter!
There’s some context that’s necessary for this post. So go read Nathan Kraft’s post about arithmetic with negative numbers.
What’s the mistake? Thoughts?
This piece of student work is kindly submitted by 3-act maven Chris Robinson.