Casio FX-115ES Scientific Calculator Logo
Emily Johnson Posted on Sep 09, 2013
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Significant figures How do i set my calculator so it gives me answers in the correct number of significant figures?

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k24674

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  • Casio Master 8,093 Answers
  • Posted on Mar 26, 2014
k24674
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In scientific calculations the number of significant figures is related to the precision of the measures for measured quantities. For calculated quantities (result of calculations involving measured quantities) the number of significant figures cannot exceed the number of significant figures of the least precise measurement. It has very little to do with the number of decimal places to which a result can be calculated.
From The Physics ToolBox by K. A. Hubbard an D. M. Katz, Brooks/Cole, a division of Thomson Learning, Australia, Canada, etc, copyright 2002.
A significant figure is any digit in a measurement that is exactly known relative to the error in the measurement. To calculate the number of significant figures follow these rules.

  1. Non zero numbers are always significant (not universally accepted).
  2. Zeros are significant when:
  • They act as place holders in a number( e.g. 50.090 has 5 significant figures);
  • They are to the left of an explicit decimal point (e.g. 7400 has four significant figures) EXCEPT when the zero is the symbolic convention for decimals (e.g. 0.37 has two significant figures)
3. Zeros are not significant when:
  • They are to the left of an implied decimal point (e.g. 380 has 2 significant figures). A few texts consider these zeros to be significant.
  • They are to the right of a decimal point, but before any significant figures (e.g. 0.000205 has three significant figures).

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  • Casio Master 102,366 Answers
  • Posted on Sep 09, 2013
kakima
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Press SHIFT MODE 6 then select the desired number of digits after the decimal point. Alternatively, press SHIFT MODE 7 then select the desired number of significant digits.

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5 Related Answers

Anonymous

  • 7 Answers
  • Posted on May 03, 2009

SOURCE: calculator won't show decimal places

Haven't heard of it giving nearest whole numbers before. But have you tried pressing SHIFT and then SETUP (upper right hand corner next to ON button) and then pressing 2 (LineIO)? Or perhaps you're in different MODE?

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k24674

  • 8093 Answers
  • Posted on Oct 02, 2009

SOURCE: Hi, I have a Casio calculator fx-991MS giving me wrong answers!

Hello,
I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you accidentally activated the Exponential display format and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation.

Let us try to reset your calculator to the normal (floating point) format.
Press the [MODE] key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4.

Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001. So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size.

Hope it helps.

Testimonial: "Thanks so much, its working now:) I thought I was going to have to buy a new calculator!"

Anonymous

  • 15 Answers
  • Posted on Jan 21, 2010

SOURCE: casio fx-82es significant figures

it should...

it can be found by SHIFT then MODE then SCI is the one you want to choose

Anonymous

  • 1 Answer
  • Posted on Mar 13, 2010

SOURCE: i setup my calculator to its original default

plz give software free download hp officejet 5610 all-in-one driver free download

Anonymous

  • 2 Answers
  • Posted on Apr 29, 2010

SOURCE: i don't want my answers in fractions

hit s-D and it changes it to a decimal

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The TI-84 is limited to numbers with at most twelve significant digits.

If you must know the EXACT value of 16!, try this. Calculate 14!. Note the two zeroes at the end. Strip them off by dividing by 100 and remember the two zeroes. Multiply by 15. Strip off the last zero by dividing by 10 and remember that we've now stripped off three zeroes. Multiply by 16. Add the three zeroes at the end to get a fourteen-digit number.

In this particular case the result is exactly what you get by using the FACT function. That's also true for 17!, but it breaks down past that because 18! has more than twelve significant digits.

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It's actually giving you the correct answer, rounded to one significant digit. If you want to see more digits, press 2ndF [FIX] and then the number of digits you want to the right of the decimal point. For example, to see two digits to the right of the decimal point, press 2ndF [FIX] 2 .
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If i need to solve 1.0739229514 to the power of 3285 >>> it's telling me overflow! is there an option i can change in the meno to make it work? and sometimes it just gives me another...

If you have not read about the limitations of your calculator, then you have just reached them.
The result is 5.58100511329x10^(101).
If you want to have more digits the computer calculator will give you 31 decimal digits.
Your calculator gives an overflow error because the result exceeds what it can handle. The largest number that your calculator can handle is 1.x10^(100).
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Make sure your decimals are set to the correct number.
And also you can perform a factory reset on the unit to make sure all is back to normal.
Just be aware that it will delete any information which you have stored into your calc.

Resetting
After using the TI-89 and changing modes several times, you may set the calculator back
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How do i enter this question on a ti 89? 5 sin(2 pi 2000 t +60 degrees) does anybody know i would appreciate it.

Hi ssmith63,
Put the calculator in radian angle mode. The top answer is in AUTO mode and, The bottom is in Approx mode.

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I converted 60 degrees into pi/3 radian which equals 1.0472 radians. I figured 5 significant digits was good enough since, you only went 4. If you have any question just post them and, I'll respond quickly.

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Frankly there is no special setting. In view of the numbers you will have to enter and the results you will get the most appropriate display format is the Scientific one.

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Select [7:SCI]. You will be asked to select the number of decimal digits in the mantissa. The correct number will depend on the number of significant digits in the least precise of number you enter. What it means, is as follows: If you multiply two numbers and one has only 2 significant digits and the other one 6, your result cannot have more than 2 significant digits. But you can use the rule after you find the result and chop off all meaningless digits.

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