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Casio FX-115ES Advanced Scientific Calculator with 2-Line Natural Textbook Display | 
 enlarge | Brand: Casio
Category: CE
List Price: $20.99
Buy New: $12.45
You Save: $8.54 (41%)
New (36) Used (4) Refurbished (1) from $9.99
Rating:  51 reviews
Color: Silver
Media: Electronics
Autographed: No
Memorabilia: No
Batteries Included: No
Battery: 1 LR44
Shipping Weight (lbs): 2
Dimensions (in): 9.5 x 5.9 x 1.5
MPN: FX-115ES-S-IH
Model: FX-115ES-S-IH
UPC: 079767171131
EAN: 0079767171131
ASIN: B000A3IAHM
Availability: Usually ships in 1-2 business days
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| Features:
| • | 279 functions, including 40 metric conversions | | • | 2-line, 12-digit Natural Textbook display | | • | Solar Plus power with battery back-up | | • | Slide-off protective hard case | | • | Currently permitted on AP, SAT and PSAT/NMSQT |
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| Editorial Reviews:
Amazon.com Product Description
The Casio FX-115ES Advanced Scientific Calculator features over 279 functions and provides its user with everything they need for most mathematical calculations. The calculator's functions include complex number calculations, matrix and vector calculations, statistics, and 40 metric conversions. Its standout feature is its 2-line natural textbook display that displays fractions, formulas, square roots and other expressions as they would in your textbook. It is extremely versatile, and can be used in courses ranging from basic pre-algebra to calculus, and also has applications in physics, engineering, biology and statistics. What's in the Box
FX-115ES scientific calculator, slide-on hard case, instruction manual, and quick reference guide.
Product Description
The FX-115ES Advanced Scientific Calculator has 2-line Natural Textbook Display and is Solar Powered. An advanced Scientific Calculator that can do Metric Conversions and has natural 2-Line textbook display. Natural textbook display shows formula and results exactly asthey appear in the textbook.
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| Customer Reviews: Read 46 more reviews...
 Excellent value - one of the best for standardized tests August 5, 2008
Now that many, if not all, of the TI/HP graphing calculators are banned from standardized exams, scientific calculators are generally approved for use. The HP 33/35 are overpriced calculators, and the TI-30XS MultiView is too basic of a calculator. The FX-115ES includes many features like differentials, integration, matrices (albeit only up to 3x3 matrices), "pretty print" or math print (where fractions are displayed like fractions in a textbook, and has a dual power system (solar power and batteries). The instruction pamphlet is large and unwieldy. TI at least includes a "booklet", while the Casio instructions are printed on a huge foldout sheet that is easily torn or lost. The ON/OFF controls for the FX-115ES are unintuitive. To turn ON the calculator, you must press a special ON button. To turn it off, you press SHIFT + AC. I instinctively hit AC to try to turn on the calculator since my old Casio scientifics all turned on in this manner. Why did they change this? The Casio also takes getting used to for TI graphing calculator users. I've used my TI-86 and TI-89 for nearly a decade and now I am forced to get acquainted with the Casio. It's not difficult but it is almost like learning a new keyboard layout. The screen text/font is also too large. While it offers a 2-line display, it really is useless for scrolling back. I am more used to the multi-line display of a TI-86/TI-89 where you can see 3-4 previous problems at a single time. They could have tried and squeezed more lines of text, but this is just a minor inconvenience. The protective cover also requires extra care to slide into place. It is not as positive or easy to use as a TI graphing calculator cover. They should have extended the tracks instead of making a curved design.
Pros: Lot of calculator for the money. Beats out the TI-30XS for power, and beats out the HP 33/35 for value.
Cons: Unwieldy instruction foldout, quirky on/off buttons (not intuitive), slightly more difficult to get used to for the TI user.
Overall: Simply one of the top choices for modern standardized exams if graphing calculators are banned.
 EXCELLENT PRODUCT June 30, 2008
I THINK THAT THIS CACULATOR IS GREAT FOR HIS PRICE.
I BOUGHT ONE AND MY BROTHER TOO.
I HAVE TI-30X IIS, BUT I THINK THAT THE CASIO FX-115ES IS BETTER.
Good product- good buy June 29, 2008
Easy to use, has all the functions needing for algebra, and gmat prep. Buttons are big enough for convenient usage. Good display. Over all a good buy from amazon for the price and the seller.
Best Calculator For Taking The FE June 13, 2008
2 out of 2 found this review helpful
The NCEES, which administers the FE and PE tests, has banned all high-end calculators, for example, the HP50 and TI89. One can only take the test with a scientific calculator from the "approved" list:
[...]
Here is a brief description of a side by side comparison of two approved machines, the HP35s and the Casio FX-115 ES. Without a doubt the Casio is the better machine:
(1) Cost: about $18 for the Casio compared to some $60 for the HP. If the only use of the calculator is for taking the test, the Casio is one-third the price of the HP. This makes the Casio the clear choice based on economics.
(2) Display: the Casio has a clear, distinct, textbook "pretty print" style of fractions and radicals. Argument entry is algebraic, and large, complicated expressions are easy to enter.
(3) Semi-symbolic logic: for example, in radian mode, "cos^-1(.5)" the Casio returns "1/3*pi", impressive for just a scientific calculator. Exact fractions and radicals are nicely done. Toggling between exact and decimal values is done at the touch of a button.
(4) No need to program: many functions on the HP, such as root-finding, have to be programmed or are hard to use. The Casio has built-in, easy to use second and third degree polynomial root-finding equations. The procedure for doing rectangular <-> polar conversions on the HP is stupid. In contrast, they are nicely done on the Casio, with a button dedicated to each one. Also included on the Casio are systems of equations, matrices, and vectors, all built-in, no programming needed.
(5) A neat feature: the Casio's integral button. Press it and an integral sign with limits pops up, easy to use. Most functions are readily integrated on the Casio, though it does choke on many root and complicated integrals.
(6) Equation solving: write an equation with X, and the Solve function on the Casio will solve it readily, every bit as good as the old HP Solver.
(6) Constants and conversions: the Casio has 40 constants and 40 conversions, which far outnumbers what the HP has.
In conclusion, the best calculator to take the test with is the Casio FX-115 ES.
Fantastic, especially for the price June 9, 2008
I'm homeschooling my 12 year old son ... he loves math and had buzzed through algebra and trig, so we started calculus this year. Much fun for both of us!
On a whim, I bought this calculator when I saw the price ($[...]) and the note that it does integrals. I thought my son would shrug his shoulders at yet another calculator. Instead, it's turned into one of his treasures. Right off, he began doing algebra on it; within an hour, he was numerically integrating functions. Lately, he's been challenging it with calculations that take ten minutes to converge. Yikes!
We've been studying physics as well, and when we were fooling with Maxwell's Equations, he'd dig the constants (permitivity & permeabilty of free space) out of the innards of the calculator.
Probably he would have loved any good calculator, but I'm delighted at how he took to this one. Simple, fairly rugged, lightweight, and cheap enough to give to a 12 year old without worries that it'll get broken or lost.
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