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Topic: RE: Calculator question
Replies: 0

 Card, Curtis Posts: 6 Registered: 12/6/04
RE: Calculator question
Posted: Jul 23, 1998 4:37 PM

This isn't a bug. On the TI-82's implicit multiplication is treated as a
higher order operation than explicit multiplication. (This is documented
in their manual, but who actually reads manuals.) Consequently, in the
expression 10/5(2) the multiplication of 5(2) is implicit and performed
before the division. In the example 10/5*2 the multiplication is
explicit and so the division/multiplications are performed in order from
left to right.

Curtis Card
Black Hills State University
Spearfish, SD 57799

-----Original Message-----
From: ap-calc [mailto:ap-calc@ets.org]
Sent: Thursday, July 23, 1998 11:35 AM
To: Multiple recipients of list
Subject: Re: Calculator question

Jerry -

Looks like a bug to me. I hope that TI is monitoring this site. You
should notify them.

Bob Enenstein
Carlmont High School

---Jerry Brodkey <jbrod@leland.Stanford.EDU> wrote:
>
> One of my former students who is now starting to teach asked me the
> following question for which I don't have a good answer;
>
> On the TI-82: 10/5*2 equals 4
>
> but 10/5(2) equals 1.
>
> The order of operations rules that I've been using for twenty years

would
> agree with the answer equal to one. Multiplication and division are
> "equal" in power and you work from left to right. The parentheses

in this
> case don't change the order of operations.
>
> Have I missed something? Thought I'd throw this out to the list

serve
> for any thoughts.
>
> Thanks ,
> Jerry Brodkey
> Menlo-Atherton High School
> Atherton, Ca
>

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