 | |  | | | Casio FX115ES Advanced Scientific Calculator - 2 Line(s) - 10 Character(s) - LCD - Solar, Battery Powered - Silver | | | | | | | |
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| $33.99 | |
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| $13.44 | |
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FX115ES | | In Stock | | Availability:
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| | Features | Natural textbook display showing formula and results exactly as they appear in the textbookEquation calculations, 40 metric conversions, matrix and vector calculations easy menu functionTable function, list-based stat data editior and fraction functions
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| | Description | The FX-115ES Advanced Scientific Calculator simplifies entry by showing formula and results exactly as they appear in the textbook. Offers more than 280 built-in math statistics and science functions including two-variable stats, list and table function, logic operations, base conversions, engineering symbol calculations, complex number calculations, Matrix and vector calculations, easy menu function, table function, list-based STAT Data Editor, Equation calculations, 40 Metric conversions, fraction functions. Also features 10-digit, 10 + 2 display; one independent and six constant memories; multi-replay function and slide-on hard case. Solar-powered with battery backup. | |
| | Product Details | | Product Length: | 0.0 inches | | Product Width: | 0.0 inches | | Product Height: | 0.0 inches | | Product Weight: | 0.73 pounds | | Package Length: | 7.4 inches | | Package Width: | 5.6 inches | | Package Height: | 1.5 inches | | Package Weight: | 0.3 pounds | | Average Customer Rating: |  based on 3 reviews |
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| | Customer Reviews | Average Customer Review: ( 3 customer reviews )
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Most Helpful Customer Reviews
3 of 3 found the following review helpful:
 The best calculator under 50 bucks. Period. Mar 30, 2011
By Trevor Stears
I'm currently in my Sophmore year, and I'm taking Gemoetry, Chemistry, and Physics. I'm unable to get one of the better calculators like a TI-89, being that they cost too much, and I find that this little thing does almost everything I need it to do. One thing high school kids will need to get used to is Algebra, which is alway a bore to deal with when the variable is not by itself. Luckily, like most higher end calculators, the Fx-115 ES has a basic CAS system, so typing in 4=x+2 and hitting Solve will return X=2. Once your using equations like Vf^2=Vi^2+2a(Xf-Xi), this solver is an invaluable feature. Other nice features include a Metric-to-Imperial converter and a pretty print display. Still, it has it's drawbacks. The calculator defaults to fractions instead of decimals, so typing in 2/3 will give me 2/3, not .66, so I have to hit the S<=>D button, which took me 2 weeks to figure out, which the instruction manual fails to clearly mention. Other than that and the fact that it sometimes takes a little too long to solve certain problems, you can't complain when you spending only 20 bucks. If you need a calculator and you can't afford a TI-89 or any equvalent to that, this is for you.
Perfect calculator for Calculus May 18, 2012
By Frankie K.
I'm a BIG technology junkie. This calculator is prime for advanced math courses, and can handle the easy math courses like childs play. I've used this calculator in my Calculus 1 college level course, and its saved so many times. It received an A in the course, and I believe I owe the credit to this magnificent adding machine. It does the equations for you...if you know how to press the proper sequence of buttons. A total must have for any student, engineer, or math nerd. Ten thumbs way up!
 Not bad. Feb 05, 2012
By Karl D. Schultheisz
Before buying this Casio device, I've owned a TI-86 for many years and gotten quite familiar with it.
I bought this because I needed a non-programmable scientific calculator for a college chemistry class. It has some features one would not expect in a scientific calculator; like the ability to take numerical integrals and derivatives (it doesn't spit out forumulas; it can only evaluate derivatives at a given x-value, and definite integrals over a given interval). It can also do finite summations and, at the touch of a button, solve single-variable equations of many forms.
It has some useful unit conversions, which are called by a code prompt. That is, one presses the CONV key, and then it asks for the conversion code, which can be reference from the list on the inside of the cover. If you lose the cover, you might have a problem. The conversions one can perform are limited to those listed; if you are dealing with strange units, you're on your own. Compare this to the TI-86, which allows you to give units to a certain number from list on the screen, and then convert to any other system of units from the same list.
Important constants are recalled in the same manner as are the conversions.
The textbook-style display mode makes expressions very clear to see. If you're used to entering expressions in linear format (as you would with a TI-86, for example), it can be annoying at times. Editing in this display mode takes a little patience, as the cursor does not intuitively move to where you need it in response to keystrokes. Forget about entering long expressions that go past the screen; they take forever to edit. If you are accustomed to entering keystrokes very rapidly, beware that the calculator may not catch all of your input. You have to slow down with this device. You can hold down the arrow button to step through an expression, but the step speed is sluggish (maybe I'm just an impatient east-coaster). As far as I know, there are no shortcut key commands for transporting to the end or beginning of an expression (like the home and end keys on a computer). With nested functions or complicated fractions, pressing up or down doesn't literally take the cursor up or down. Sometimes it does nothing. The left and right buttons alone appear to allow one to reach to every part of an expression, with no need for up/down. To Casio, I ask: why include a pair of buttons that compete with another pair?
Entering numbers in scientific or engineering notation is slightly different. There is a key entitled "*10^x" which one would think to be the equivalent of the TI "EE" key. It is, but with some inconsistency of visual formatting. You might expect that such a key would display a superscript exponent; it doesn't. On a TI-86, one enters
[1][.][6][EE][-][9], which appears as
1.6E-9
While on the Casio, the sequence is
[1][.][6][*10^x][-][9], and the expression looks like
1.6x10-9
(the "10" is a single character, and visually smaller than [1][0].)
The supplied user manual consists of a single printed sheet of paper rather than a proper booklet. As such, it is difficult to look up certain functions of the machine, which gives one the feeling that certain aspects of its operation will remain unknown for years.
Ultimately, I bought the device because it is cheap, well-reviewed, and legal for my chemistry exams. For my own personal mathematics work, I much prefer my trusty TI-86, which is easy for editing big expressions and much more fun to use (although computation of integrals take a longer time, and it doesn't have the textbook display option.) Of course, a graphing calculator is meant for a different purpose. The two can only be compared insofar as they each are calculators with some similar features.
Switching brands can be tricky. Owning the FX-115ES has made me more curious about the TI scientific calculators.
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