📐 Elevate your math game with precision and speed — don’t get left behind!
The CASIO FX-991CW is a cutting-edge scientific calculator featuring a high-resolution LCD that displays complex data like spreadsheets and 4x4 matrices. With 552 advanced functions including integration, differentiation, and polynomial solving, it’s solar powered with battery backup for uninterrupted use. Designed for students and professionals alike, it offers intuitive navigation, natural textbook display, and seamless compatibility with ClassPad.net, making it a top choice for mastering advanced math.
| ASIN | B0BSJ33C4R |
| Amazon Bestseller | #65,356 in Office Products ( See Top 100 in Office Products ) #43 in Scientific Calculators |
| Batteries Included | Yes |
| Batteries Required | Yes |
| Brand | Casio |
| Color Name | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,899) |
| Date First Available | June 23, 2023 |
| Display Size | 2.25 Inches |
| Display Type | LCD |
| Item Model Number | FX-991CW |
| Item Weight | 3.35 Ounces |
| Item model number | FX-991CW |
| Manufacturer | Casio |
| Material | Plastic |
| Product Dimensions | 7.7 x 16.21 x 1.07 cm; 94.97 g |
| Release date | March 1, 2023 |
| Size | 0.4 x 3 x 6.3 |
A**ー
いいよ
A**O
Casio
Casio managed to update a classic without ruining it. The FX-991CW takes the reliable computational power of its predecessor and wraps it in a smooth, accessible, and high-tech shell. Absolutely highly recommended.
目**き
カシオの関数電卓CLASSWIZの最新機で日本版のfx-JP900CWのグローバル版ということらしい． 先代機のfx-991EX（fX-JP900-Nのグローバル版）は愛用しているが，持ち運び用とデスク常備用で使い分けようと思い購入． 結論として「関数電卓としては」少し残念な仕様変更になっている． デザインは主に記号入力ボタンの白印字とそれに対応したSIFTと組み合わせる「裏入力」表示のゴールドのツートーンがシンプルで，何を押せばいいのかが直感的によりわかりやすくなっているのがいい． logボタンの表裏は日本版と逆になっているようだ． これは好みや使い方の問題だろうが,個人的には「底を指定のlog」が表で，裏に自然対数や常用対数となっているこの海外版の仕様のほうが好みだ．（なぜって底が揃っていない計算の方が面倒だから電卓の出番が多い．） 速度や計算精度は概ね強化されているのも良い点．（シンプルな関数の定積分なら割と早い．カシオやHPの上位機種のグラフ電卓には流石に敵わないが．） 残念だと思う先代からの変更点はS⇔Dボタンが無くなったこと．計算結果の表示を分数や小数で切り替えるのがFORMATボタンから上下カーソルで選択式になって手間が増えたのが地味に不便．（10桁までの整数なら素因数分解ができるがそれはちょっと嬉しい．） また定積分がボタンで一発で呼び出せず操作盤のどこにも積分記号がないのが混乱する．（これはCATALOGからFunc Analysisを呼び出してさらにIntegrationを選択しなくてはならなくなった．） 性能は確かに強化されているが，おそらく多くのエンジニアにも他の理系の人にもUIは不便になったと思われる． ボタンが見やすくなったのは助かるが，UI周りの仕様で関数電卓を普通の電卓ユーザーのニーズに寄せなくてもいいと感じた． よく使う計算はすぐに操作は覚えられたが，その大半で先代機よりわずかに手間がかかる． 普段遣いは結局先代機になりそうだ．
M**K
رائعه تعطي لحلول مباشر للقواعد
F**O
The Casio fx-991CW is an excellent calculator with very good performance and a wide range of useful features. It is easy to use, fast, and well designed, making it perfect for students and professionals who need reliable calculations. The display is clear and the overall build quality feels solid and durable. I also want to highlight that the Amazon delivery time was reasonable, especially considering that this was an international transaction. The product arrived well packaged and in perfect condition. Overall, I am very satisfied with this purchase and would definitely recommend this calculator.
D**H
I got this for my son in Grade 10. It has 500+ functions in total. Clearly he's not going to need all of them. But, it 10 minutes, with the help of the 150 page PDF, it was easy enough to figure out how to do some of the basic algebra and trigonometry functions that he needs. The screen is a nice size. It shows equations, fractions, and decimals. It's clear and easy to read. You can have spreadsheets and data tables. We didn't get the calculator for all those features, but they're available. It comes with a protective case that covers the screen and buttons. The cover, when removed, clips on the back so it's easy to store.
P**O
Ótima calculadora científica, de qualidade. Esta versão sem o LA (creio que seja de Latin America), não possui idioma português, somente inglês. Comprei já sabendo disso e pra mim, tudo tranquilo.
R**A
Best calculator i ever used it does need time to learn but honestly didn’t deter me from loving it
