Not all 4’s are created equal. Huh? Let me clarify. A salary of $4,000 is quite different from that of $40,000. Wouldn’t you agree? All because of one seemingly insignificant little dot. So, how can $0.25 = 0.25¢ or 25¢ = 0.25¢ ? It totally baffles me.
Here are other examples I have found in the last eight months.
Don’t despair. There is hope. A nearby grocery store remodeled recently. During their grand reopening, I noticed that in their produce section, all price signs had both a decimal point and a cent sign. How sacrilege! Much to my teenager’s dismay and embarrassment, I took it upon myself to remove all the plastic decimal tiles and neatly placed them in a pile to the side. You will be happy to know ever since that liberating day, this particular grocery store has not made the same erroneous mistake. Somewhere in their security office is probably a picture of me with the caption, “WARNING: Watch out for a crazy woman rearranging store merchandise!”
2 comments:
A lot of students struggle to recognize that there is a difference between $0.50 and $0.5 (the answer the calculator gives). They will write $200 instead of $2.00 and argue that it is the same thing. Your pictures could help lead an interesting discussion with your class. What a great way to stress the importance of place value.
You should try to get 2 of those pencils for a penny - see what they do.
For a particularly sad example of not understanding the importance of decimal points in money, see http://verizonmath.blogspot.com/
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