[Numeracy 459] Re: Monday Puzzle
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Tue Aug 3 13:20:25 EDT 2010
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Good point. Several programming languages also use the equal sign as
an assignment operator. This can also be confusing. For example, the
statement
x = x + 1
means "add one to the current value of x and store the result in x." For
algorithms, many prefer
x ← x + 1
Chip Burkitt
On 8/3/2010 11:15 AM, Ladnor Geissinger wrote:
> Oh please, don't ever write such an obviously incorrect equation for
> your students, and don't let them write things like that! No wonder
> they think math is confusing and makes no sense.
> 30 - 3 =27 and 27 - 2 =25 are both correct of course, but 30 - 3 = 27
> - 2 is clearly wrong.
>
> Given two numerical expressions expr1 and expr2, when we write the
> shorthand sentence " expr1 = expr2 " we mean that if, or when, you
> evaluate both expressions then the resulting numbers are in fact the same.
> ---------------------------------------------------------------------------------------------------------------------
> On 8/3/2010 10:28 AM, McIntosh, Tricia wrote:
>> $30 - $3 = $27 - $2 = $25
>>
>> orig. amt - money returned = charged amt - pocketed amt from the over charge = cost of room
>>
>> Tricia McIntosh
>> I-BEST Facilitator/Instructor
>> http://ghc.ctc.edu/voc/ibest.htm
>> 360-533-9448
>> ________________________________
>> From: numeracy-bounces at nifl.gov [numeracy-bounces at nifl.gov] on behalf of Istas, Brooke [IstasB at cowley.edu]
>> Sent: Monday, August 02, 2010 3:11 PM
>> To: numeracy at nifl.gov
>> Subject: [Numeracy 448] Monday Puzzle
>>
>> Three men go to a motel to rent a room for the night. The manager is not there so the bellhop waits on them. He doesn’t know how much the room is so he decides to charge them $10 per person making the total cost for the room $30 dollars. When the manager returns, the bellhop tells the manager what he did. The manager tells the bellhop that the room is not that much and gives $5 dollars back to the bellhop to give to the men. On the bellhop’s way to the room, he thinks about the trouble of dividing $5 dollars among the three men so he puts $2 in his pocket and gives each man in the motel room $1 dollar back. Now, if they each paid $9 for their room, 3 X $9 = $27 plus the $2 the bellhop put in his pocket equals $29 dollars. What happened to the other $1 dollar?
>>
>> If you figure this riddle out, please reply with your answer and explanation. Good Luck this one is tricky but my adult learners love these types of activities.
>> Happy Monday!
>>
>> Brooke Istas
>>
>>
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>>
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