Review And Compare Calculator with 2-Line Natural Textbook Display

I had an upcoming exam that specifically prohibited programmable calculators, so while I have quite the "stable" HP RPN machines, all of them were out. The FX-115ES was what I found as a substitute, and I'm quite impressed, especially for the price (which is $18 at Target, BTW). The machine works well and is quite feature-laden and easy to use -- I believe it is the most powerful non-programmable, non-graphing machine out there, and at a price where you can afford a few spares to spread around your home, office, car, etc. so that you don't have to worry about losing one.

I've had tons of calculators over time, with the Casio FX-4000P (back in the late '80s) being the first truly memorable one (my brother had an FX-7000G, the first graphing calculator). I switched to HPs in college, and I am still an RPN die-hard (I'm eagerly awaiting the release of the 30th anniversary HP-35s this summer!), but I can still appreciate a quality product such as this from Casio. King of affordable full featured sci calculators anyways. I bought this & the 115ms specifically for the NCEES FE/FS exams after heavy use of ti-86 thru most of undergrad school. The TI certainly is nice for graphing, full matrix capability, programming, etc., but in general, i wish i had used the Casios all along as they are so incredibly handy & much easier to lug along. It's really all you'll need, even thru calculus, physics, statistics & chemistry. The 2-line display on the 115es is handy, and the natural display is nice for seeing fractions displayed in a horizontal stack (as would appear on paper), for entering derivative or integration problems as would be in a textbook, and for the standard display of answers (i.e. exact answer vs. decimal answer). Otherwise, its easy enough to switch to the more common 'line' entry mode to get all answers in decimal(as some mental giants here have complained about), or simply hit the S-D key [standard to decimal].

Things i like about the 115ms specifically (compared to the 115es) is its clearer, crisper display, the keyboard is more intuitive, and also the solve feature is more flexible than the es. If you input an equation using multiple variables, with the ms, you just toggle between the variable inputs as you're entering the data to solve for the desired one. With the es, you have to specify at the end of your equation which variable you want to solve for, before you even get to the data input. A minor gripe.

Otherwise, the es is definitely more user-friendly in the various modes available, and with matrix, table, and vector capability, unit conversions and some scientific constants, much more advanced than the ms. Casio should combine the pros of the 2 platforms and they could call it the 115ts because it would be "the-sh#t! Also, they need to make a real operator manual - otherwise i would of given 5-stars for this full-featured gem.

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