Question about Texas Instruments TI-84 Plus Calculator

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Rounding a variable

I'm wrighting a programme and i want to round the final number. the programme calcs 'I', then i have written;
:round(1,5)->J
:Output(8,5,J
:Pause

when i run the programme, it works fine, except it diplays an answer that isn't rounded at all; usually it has about 9 decimal places.
what am i doing wrong???

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When your writing your program there is a much easier way of doing it. Just where ever you want in your program when hit mode then go to the point you want. so it will round to how many digits you want.
Lets say you want it rounded to 9 places go
:fix 9
:disp i
or what ever you want Good luck

Posted on Oct 25, 2008

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1 Answer

Round 3 to ten


Rounding 3 to the nearest tens.

The process should always be the same.

Step 1 - identify the column in question.
Step 2 - go the the column immediately to the right of this column
Step 3 - if this number is 5 or more, add 1 to the column in question and make all numbers to the right 0, or if to the right of the decimal, eliminate them.
Step 4 - if this number is 4 or less, don't add 1 to the column in question and make all number to the right 0, or if to the right of the decimal, eliminate them.

To assist, I have written the number as 03.

Step 1 - Tens column is the 0.
Step 2 - Column immediately to the right is 3
Step 3 - Number is not 5 or more
Step 4 - Number is 4 or less, set the numbers to the right to 0

The answer is 0. The numbers -4, -3, -2, -1, 0, 1, 2, 3, and 4 when rounded to the nearest 10, all round to 0.

Good luck,

Paul

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1 Answer

How do I round a decimal when you have a lot of numbers after the decimal point?


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So when dropping decimals round up the last remaining of the dropped decimal is 5 or over, otherwise it is unaltered. So 2.2361 rounded off to 3 dec is 2.236, and rounded to 2 dec it is 2.24.

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What is a dependent and independent varible


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How can I format a java string using a width variable?


The Entities in java are slightly different. I adore them being included (finally).

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Where do I go to find an on-line manual for TI 5045 Sv Texas Instruments calculator?


TI-5045 SV
ii
English.............................................................. 1
Fran?ais ............................................................ 6
Espa?ol ............................................................. 11
Portugu?s ........................................................... 16
Examples, exemples, ejemplos, exemplos .............................. 21
ILLUSTRATIONS ¦ FIGURES ¦ ILUSTRACIONES¦ ILUSTRA??ES
Removable tab
Languette
Leng?eta extracci?n
Alavanca usada para o rolo
Ink roller
Rouleau encreur
Tamp?n de tinta
Cartucho de tinta
1
English
Your Texas Instruments calculator has a built-in printer for producing a permanent record printout of
your calculations with negative numbers printed in red. A big, easy-to-read display also enables you to
check entries or perform quick calculations without printing.
GETTING STARTED
OFF ON PRT IC GT
POWER
1. Connect the calculator to a proper power outlet (110-120V or 220-240V
where available).
2. The calculator is turned on by setting the POWER switch to the PRT
position.
Inserting the paper (see illustrations 1, 2, 3, and 4 on page ii).
1. Turn on the calculator.
2. Open the printer compartment cover by pressing down on its front edge and sliding it back in the
direction of the arrow.
3. Fit the roll of paper on the holder so that it unrolls from the bottom, with the loose end toward the
calculator.
4. Cut the end of the paper squarely and insert it firmly into the printer slot on the back of the
calculator.
5. Press & until the paper is in the printing position.
Replacing the ink roller (see illustrations 5 and 6 on page ii)
1. Turn the calculator off and tear off the excess paper.
2. Remove the printer cover by pressing down on both sides of the front edge and sliding back in the
direction of the arrow.
3. Remove the old ink roller by lifting it with the removal tab.
4. Insert the new ink roller into the compartment and press down gently until it snaps into place. Close
the printer compartment.
Note: The old ink rollers should not be refilled. Replacement rollers can be obtained from your local
retailer. The warranty does not cover ink roller replacement.
2
SELECTION SWITCH SETTINGS
OFF ON PRT IC GT
POWER ROUND
: 5/4 9 + F 0 2 3
DECIMAL
4
TAX
SET CALC
Set the POWER, ROUND, DECIMAL and TAX switches as required.
Note: The TAX switch is spring-loaded to return to CALC when it is moved to SET and released.
The switch settings are summarized in the following table:
SWITCH SETTING FUNCTION
POWER ON
PRT
IC
GT
No printout is provided; however, the display can be printed by pressing
4.
The printer provides a printout of your calculations but does not count them.
The printer is on and an item count of additions and subtractions to or from
the register is printed when sub-totaled or totaled.
The GT position controls whether or not the totals from the independent add
register are accumulated in the grand total register.
ROUND Rounds the result of a calculation to the selected number of decimal places.
:
5/4
9
Truncates the result to the selected number of decimal places.
Rounds the result up or down according to its value. For example, when the
DECIMAL switch is set to 2, the result is rounded up if the third decimal
position is 5 or more and rounded down if it is 4 or less.
Rounds the result up to the selected number of decimal places.
Ex. 220 P 6
Setup: PRINTER: PRT, ROUND: :
DECIMAL: 2, TAX: CALC
Ex. 220 P 6
Setup: PRINTER: PRT, ROUND: 5/4
DECIMAL: 2, TAX: CALC
Press Display Printout Press Display Printout
2 0. 0¦ C
220 ' 220. 220¦ P
6 3 36.66 6¦ =
36¦66 ?
2 0. 0¦ C
220 ' 220. 220¦ P
6 3 36.67 6¦ =
36¦67 ?
DECIMAL + Add mode: All results are given with two decimal places. For addition and
subtraction only, a decimal point is automatically placed to the left of the last
two digits entered, unless the number already includes a decimal point.
F Floating mode: Any results are displayed and printed with the maximum
number of decimal places.
0 2 3 4 Fixed decimal mode: Sets the number of decimals to 0, 2, 3, or 4.
3
TAX SET
CALC
Lets you enter a tax rate to perform tax calculations.
Stores the tax rate. Pressing ! or " after a tax rate has been entered,
adds/subtracts the stored tax rate to/from the value in the display.
Ex. VAT = 17.5 %
100 + VAT
Ex. VAT = 17.5 %
235 - VAT
Setup: PRINTER: PRT, DECIMAL: F, ROUND: 5/4, TAX: CALC
Move and hold the TAX switch to SET. Press 217 L 5 and release the TAX switch. It
automatically returns to CALC. 17.5% is printed.
Press Display Printout Press Display Printout
2 0. 0¦ C
100! 117.5 100¦
17¦5 @
117¦5 ?
2 0. 0¦ C
235" 200. 235¦
N35¦ @
200¦ ?
Note: The most common setup is POWER: PRT, ROUND: 5/4, DECIMAL: 2, TAX: CALC. Use these
positions for the examples unless other settings are given.
KEY DESCRIPTIONS
Basic keys
I Clear Entry: Clears an entry, enabling you to enter another number in its place. Note
that this key does not clear the add register.
2 Clear Key: Clears the add register, any pending operations, and the display. 0.C is
printed. Does not clear the memory.
( Right Shift: Deletes the right-most digit entered from an entry before an operation key is
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L Decimal Point: Enters a decimal point.
4 Date/Non-Add: Prints a date (such as 12¦10¦96) or a number for reference purposes.
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& Paper Advance: Advances the printing paper.
Addition and subtraction keys
9 Add: Adds a number to the add register. Displays the cumulated result.
: Subtotal: Gives the intermediate total from the add register. Using this key does not
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. Subtract: Subtracts a number from the add register. Displays the cumulated result.
E Total: Gives the total from the add register, and then clears the register.
4
Multiplication, division, percent and margin keys
? Multiply: Multiplies the number in the display by the next value entered.
' Divide: Divides the number in the display by the next value entered.
3 Equals: Completes any pending multiplication or division operation.
> Percent: Calculates percentages, ratios, add-ons (e.g. of VAT), or discounts.
# Gross Profit Margin: Calculates the selling price of an item when its cost and gross
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Profit margin: 40%
Press:2 594 # 40 3
Answer:
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Gross profit: 396
Ex.
Selling price including VAT: 252
VAT %: 20%
Press: 252 # 20 . 3
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/ Grand Total: Gives the grand total of the operations previously performed and stored in the
Grand Total register. Every time a total is obtained with E it is cumulated into this register
(printout shows G+) which is only cleared when / is pressed twice. During long
calculations, if / is not used, this re

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Please rate this response . .

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