Question about Texas Instruments TI-30XA Calculator

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My calculator is rounding my answers up. For example, if I divide 5 by 2 the answer comes up as 3 instead of 2.5

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Hello,
Increase the number of decimal digits. Here is a clipping of the guide to help you configure calculator. I hope it helps.

my calculator is rounding my answers - 988ebcb.jpg

Posted on Oct 08, 2009

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1 Answer

How to divide 1 2/3 by 3


First make 1 2/3 into a mixed fraction and then divide it by 3.
To make 1 2/3 into a mixed fraction, multiply the whole number, in this case, 1, by the denominator (the bottom number) and then add the numerator (the top number). Thus, we get (1*3+2)/3 or 5/3. Now we have to take 5/3 and divide it by 3. I was taught that in this case, dividing by 3 is the same as multiplying by 1/3. 5/3 x 1/3 = 5/9.

If you have access to a calculator you can always check this. On the calculator, do 2 divided by 3 and add 1. Now take that answer and divide by 3. Write down this answer. Now take 5 and divide by 9. Write down this answer. They should be the same.

Good luck.

Paul

Mar 17, 2015 | Office Equipment & Supplies

1 Answer

How come i dont get the right answer for example 120 divided by tan68 = -58 instead of 45?


Make sure your calculator is set to the desired angular mode.

The quotient of 120 divided by the tangent of 68 radians is about -58.82, as your calculator is giving you.
The quotient of 120 divided by the tangent of 68 degrees is about 48.48 . The quotient of 120 divided by the tangent of 68 grads is about 65.97 .

Oct 06, 2014 | Casio FX-9750GII Graphing Calculator

1 Answer

Change square root answer to fractions


It will usually only be an approximation when you do that. Take sqrt 3 for example, 1.7320508.......the decimals go on and on.

So we usually write 1.7321 or some other rounding off. This means 1 and 7321/10000 which does not divide exactly, so you would have to fudge again, say 1 and 732/1000 or 1 and 73/100, which is not the true answer.

Occasionally you get lucky like sqrt 18.0625 = 4.25 = 4 25/100
which is 4 1/4 exactly.

Dec 18, 2013 | Sharp El-531x Scientific Calculator Green...

1 Answer

How to calculate mode with caso fx-991ES


MOD simply calculates the remainder that is left over after dividing by the MOD parameter.
For example, 10MOD7 = 3 since you can only divide 7 into 10 once, leaving a remainder of 3.
For larger numbers, eg 389487MOD31 you start by dividing 389487 by 31, which gives 12564.09677 (on the display), however you only want the fractional part so subtract 12564 to give 0.0967741935 . This includes the lower value digits that were previously hidden. Then multiply this result by 31 which gives 2.999999999 on the display. Since the result of a MOD calculation has to be a whole number, the answer needs to be rounded to 3. If the answer doesn't easily round to a whole number, it is likely that you have gone beyond the calculators working capacity.
An alternative method is to take the integer part of the first result (12564) and multiply it by 31 to get 389484, then subtract this from 389487, giving the answer of 3.

Feb 23, 2013 | Casio FX991ES Scientific Calculator

1 Answer

How to find remainder as a solution in CASIO fx991ES


Finding the remainder from a division calculation is often referred to as using the MOD function, though this isn't available directly on the fx-991ES.
To obtain the remainder, for example when dividing 10 by 7, you can only divide 7 into 10 once, leaving a remainder of 3.
For larger numbers, eg when dividing 389487 by 31 (equivalent to 389487MOD31) the division gives an answer of 12564.09677 (on the display), however you only want the fractional part so subtract 12564 to give 0.0967741935 . This includes the lower value digits that were previously hidden. Then multiply this result by 31 which gives 2.999999999 on the display. Since the result of a MOD or remainder calculation involving integers has to be a whole number, the answer needs to be rounded to 3. If the answer doesn't easily round to a whole number, it is likely that you have gone beyond the calculator's working capacity.
An alternative method which avoids the rounding of the fractional part is to take the integer part of the first result (12564) and multiply it by 31 to get 389484, then subtract this from 389487, giving the answer of 3.

Dec 16, 2012 | Casio FX991ES Scientific Calculator

2 Answers

IQ SOLVED 5*5=2030,3*5=1220,5*3=?


2012 is answer
(5) square = 25 , 25-5 = 20 , (5)square = 25 , 25+5 = 30 so == 2030, (3)square = 9 , 9+3 = 12, (5)square = 25 , 25-5 = 20 so == 1220, now
5) square = 25 ., 25-5 = 20, 3)square = 9 , 9+3 = 12


the +,-,+,- series is continued.

Apr 12, 2012 | Vivendi Excel@ Mathematics Study Skills...

1 Answer

When I divide, answers show up wrong.


Answers show in an unexpected (by you) format, but they are correct and in conformity with the MODE settings of the calculator.

If you want to have the results displayed as decimal numbers,
  1. open the HOME screen.
  2. Press MODE to open the Mode configuration.
  3. Press F2 or use the DownArrow to reach the second page of settings.
  4. Move Cursor to highlight the option at the right of EXACT/APPROX.
  5. Use the right arrow to unfold the menu and select 3:APPROXIMATE.
  6. Press ENTER to Save the changes.

Mar 22, 2010 | Texas Instruments TI-89 Calculator

1 Answer

The calculator won't convert fractions into decimals


Are you using a ti-89? If so, check your mode settings and change Exact to Approximate.

Feb 06, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Fraction problem


Go into MODE to the second page.  In Exact/Approximate, change it to Approx instead of Auto or Exact.  This will give you decimals instead of fractions.

Nov 17, 2007 | Texas Instruments TI-89 Calculator

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