Question about Casio HR-100TMPlus Calculator

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INSTRUCTIONS FOR THE KEYS ON THE CALCULATOR

There are no explainations for what each key is and it's function. Of course some are a given, but what is the key MU/MD? Would like a manual that explains all the key functions.

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  • Anonymous Jan 17, 2009

    how to get grand total when adding

  • Anonymous Feb 26, 2009

    I think it may have to do with machine dating the tape, but I'm not sure.

  • joyce perez Oct 20, 2011

    Mu/MD stands for mark up and mark down. It is used for item increase or decrease in price.

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To get a subtotal when adding, finish entering the last number before the subtotal, hit the +, then hit the diamond/pound sign key (just above the 7)

To get a grand total when adding, finish entering the last number in your list, hit the +, then hit the *.

Posted on Feb 26, 2009

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MU/MD stands for mark up and mark down. It is used for item increase or decrease in price.

Posted on Oct 20, 2011

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Where is the CFj key on the TI-84?


There is no key for that. If you want to use npv( net present value, you access it by pressing APPS>1:Finance>7:npv(
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In the TI84Plus manual, the chapter 14: Applications treats the calculation of cash flows.

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How to find inverse of log in a casio 991ms calci?


The inverse of the natural logarithm (in base e) is the EXPONENTIAL function (e^x). It shares the same physical key as the LN function. One is accessed directly and the other through the SHIFT key. The inverse of the logarithm in base 10 is the function 10^x. Both functions share the same physical key as described above.
More generally if y=log(in base b) of x =log_b(x) then x=b^(y). The base must of course be a non-zero positive number.

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I'm using the original TI-30 SOL calculator. Is there any way to do inverse sine or cosine?


Of course. Just press the INV key before pressing the appropriate trig function key. For example, to calculate the inverse sine, press INV then sin.

Apr 05, 2011 | Texas Instruments TI-30XA Calculator

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What does the eng,in,sin.cos,hyp,rcl,abs


You sure will benefit more from your calculator by taking a look at its manual. After all that is what it was created for.

No matter. I am willing to presume that if you are asking about these keys that is because you have not seen the relevant functions yet in your Math courses. One day or another (soon) you will know about them, and I will not go into explaining what they are or what they are used for. (Awfully SORRY)
  1. ENG signifies engineering notation (No I will not explain what it is).
  2. SIN, COS, and TAN are the keys for the trigonometric function sine, cosine, and tangent.
  3. HYP is entered before a trigonometric function key to calculate its hyperbolic counterpart : the hyperbolic sine (HYP SIN), the hyperbolic cosine (HYP COS), and the hyperbolic tangent (HYP TAN).
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Won't turn on


hi cbonge,

A battery reset procedure should bring your Ti 84 Plus back to life.

Make sure the batteries are in correctly? The batteries alternate negative/positive, positive/ negative and so on. The first time I put the batteries in, I didn't have them in correctly. I know if it happen to me that anybody could make the same mistake. And of course, the calculator will never come on if the batteries aren't in correctly.

The process below should reset your calculator.

Please be prepared to re-install the calculator's OS if you run through this process.

1). Pressing the [2nd] key followed by pressing and releasing the [Up Arrow] key. This adjust the contrast in case the contrast was to low. Keep repeating if necessary for about 10 seconds and, then go to the next step. If calculator comes on and responds to key functions your done.

2). Remove one of the AAA batteries. Press and hold the [CLEAR] key. While holding [CLEAR],
reinsert the AAA battery and then turn the calculator on. The calculator should display the
message "RAM Cleared". Release the [CLEAR] key and then press it one more time to remove the message. If calculator starts responding to key functions your done.

3). Remove one of the AAA batteries. Press and hold the [DEL] key. While holding [DEL], reinsert the AAA battery and then turn the calculator on. The calculator should display
"Waiting...Please install calculator software now". Follow the instructions for the
TI-83 family or TI-84 Plus family to reinstall the calculator operating system.

4). Steps to re-installing the operating system:
~Connect the TI Connectivity cable between the PC and the calculator.
~Click on Start >> Programs >> TI Tools >> TI Connect >> TI OSDownloader
~Follow the on-screen directions to reinstall the calculator's OS.

5). Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.

6). If the above process did not work. Try re-doing the procedure and, extend the time in step 4, by 5 minutes to 10 minutes before you put all the batteries back in the calculator. These calculators can be a little stubborn at times so, keep trying and follow the procedures.

Jan 07, 2011 | Texas Instruments TI-84 Plus Silver...

1 Answer

My ti84 plus won't turn on


Hi ezheng1000,

A battery reset procedure should bring your Ti 84 Plus back to life.

Make sure the batteries are in correctly? The batteries alternate negative/positive, positive/ negative and so on. The first time I put the batteries in, I didn't have them in correctly. I know if it happen to me that anybody could make the same mistake. And of course, the calculator will never come on if the batteries aren't in correctly.

The process below should reset your calculator.

Please be prepared to re-install the calculator's OS if you run through this process.

1). Pressing the [2nd] key followed by pressing and releasing the [Up Arrow] key. This adjust the contrast in case the contrast was to low. Keep repeating if necessary for about 10 seconds and, then go to the next step. If calculator comes on and responds to key functions your done.

2). Remove one of the AAA batteries. Press and hold the [CLEAR] key. While holding [CLEAR],
reinsert the AAA battery and then turn the calculator on. The calculator should display the
message "RAM Cleared". Release the [CLEAR] key and then press it one more time to remove the message. If calculator starts responding to key functions your done.

3). Remove one of the AAA batteries. Press and hold the [DEL] key. While holding [DEL], reinsert the AAA battery and then turn the calculator on. The calculator should display
"Waiting...Please install calculator software now". Follow the instructions for the
TI-83 family or TI-84 Plus family to reinstall the calculator operating system.

4). Steps to re-installing the operating system:
~Connect the TI Connectivity cable between the PC and the calculator.
~Click on Start >> Programs >> TI Tools >> TI Connect >> TI OSDownloader
~Follow the on-screen directions to reinstall the calculator's OS.

5). Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.

6). If the above process did not work. Try re-doing the procedure and, extend the time in step 4, by 5 minutes to 10 minutes before you put all the batteries back in the calculator. These calculators can be a little stubborn at times so, keep trying and follow the procedures.

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For example, with most calculators you would type 30 [sin] to calculate the sine function of 30 degrees, with the 115ES its [sin] 30 [=].

The 115ES has all the standard trigonometric functions:
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  • Inverse trigonometric (sin?¹, cos?¹, tan?¹), type [SHIFT][sin], [SHIFT][cos] or [SHIFT][tan] followed by the argument.
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On model Casio fx-115w cannot find key X1/y. Any


Use x-root-y, the shifted function of the x^y key, below ON and above LN.

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1 Answer

Percentage function


Pick up the small instruction booklet here and look at page 4, the "%" key has 4 functions...

http://education.ti.com/educationportal/downloadcenter/SoftwareList.do?website=US&tabId=2&paneId=18#27

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