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kristopolousyesterday at 9:16 PM9 repliesview on HN

Show me a highschool math problem you can't do on a $12 Casio scientific like the classic FX-300MS https://www.usaofficemachines.com/csofx300ms-fx-300ms-scient...

There's even knockoffs of it for $1: https://www.aliexpress.us/item/3256809744184708.html

I picked one up when the 99 cent store was shutting down. It works fine.

Look what you can get for $20: https://www.casio.com/intl/scientific-calculators/product.FX...

TI is like the Intuit of the education world. I want to love them but this is ridiculous - a N4120 celeron laptop is the same price as this new calculator - it might be a garbage laptop but it's doing a heck of a lot more for your $160 than this calculator is.


Replies

quackeryesterday at 10:38 PM

Well, the TI-83/84 are called a graphing calculators for a reason: you can plot equations and datasets with them and look at them right there[1]. Looking at graphs is huge for learning, or at least it was for me, and school isn't just about plugging things in and getting an answer (or shouldn't be, at least).

Doesn't mean it's not overpriced, but that's one reason and you can get a used TI-83/84 for like $30 or less. They pretty much never break.

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1. Okay, the Casio can QR-code-link you to a graph, but if I have internet/smartphone there are better graphing tools anyway, like Desmos.

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pverheggenyesterday at 10:42 PM

If you count basic calculus as high school level, TI89's can do symbolic integration. They're usually banned on tests for that exact reason tho.

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varun_chyesterday at 9:22 PM

International Baccalaureate math has some stats questions that require a calculator that can do stats questions. Not really possible by hand in exam conditions!

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jhallenworldyesterday at 10:07 PM

My favorite cheap Casio is fx-115ES Plus 2nd Edition, $17

https://www.amazon.com/Casio-fx-115ESPLS2-Advanced-Scientifi...

Includes GCD and LCM, some of the newer ones don't have them.

If you want graphing, there is the newish fx-CG100 has a nice display, but they removed Casio basic, it now only has micro Python (way too awkward to type on a tiny keypad):

https://www.amazon.com/Casio-ClassWiz%C2%AE-Calculator-Funct...

The older ones that still have basic:

https://www.amazon.com/Casio-fx-9750GIII-Graphing-Calculator...

BTW, here is a review I made of many calculators, measuring keyboard efficiency: (HP-15c still the best)

https://github.com/jhallen/calculator/wiki

rogerrogerryesterday at 9:18 PM

The contrived ones where they make you graph stuff, but that’s about it.

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kevin_thibedeautoday at 12:14 AM

Most of those are counterfeit knockoffs and the buttons are unreliable. It's safer to buy an older, pre-VPAM variant of the 300 or 991 models.

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jedimasterttoday at 2:10 AM

I'm personally a fan of the ti-30xs. Still cheap and a good number of features for looking at data

balls187yesterday at 9:28 PM

Generating a QR code to see the graph online is kind of cool, but also kinda dumb too.

I mean, these days kids have smartphones, what's the point of a graphing calculator?

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vkouyesterday at 11:34 PM

> Show me a highschool math problem you can't do on a $12 Casio scientific like the classic FX-300MS

There isn't one.

The TI-83 is just a $160 tax on every high school student. There is precisely zero use in a graphing calculator before university.

If you ever need a plot of literally any function you'd be plotting in high school, you should be able to do a very quick, very rough approximation by hand. If you can't, you haven't learned the material.

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