Casio FX-991EX plus Scientific Calculator Classwiz scientific calculator for Board Examination | Shopee Philippines
![UP ACES on Twitter: "Only PRC-approved scientific calculators and Casio fx- 991es are allowed to be used in the National Civil Engineering Quiz 2018. Casio Classwiz fx-991 EX is NOT allowed. #NCES2018 #BuildForTheNation UP ACES on Twitter: "Only PRC-approved scientific calculators and Casio fx- 991es are allowed to be used in the National Civil Engineering Quiz 2018. Casio Classwiz fx-991 EX is NOT allowed. #NCES2018 #BuildForTheNation](https://pbs.twimg.com/media/DmVDOukU8AAYAjy.jpg:large)
UP ACES on Twitter: "Only PRC-approved scientific calculators and Casio fx- 991es are allowed to be used in the National Civil Engineering Quiz 2018. Casio Classwiz fx-991 EX is NOT allowed. #NCES2018 #BuildForTheNation
![Casio fx-991EX keeps giving math error for simple calculations like ((1/2)/2) and sin inverse (10) etc. Any idea on how to fix this? Is there a chance that the calculator may be Casio fx-991EX keeps giving math error for simple calculations like ((1/2)/2) and sin inverse (10) etc. Any idea on how to fix this? Is there a chance that the calculator may be](https://preview.redd.it/c3y0lcx0ody81.jpg?width=3000&format=pjpg&auto=webp&s=fbeca87556aad36f1c967016c1ccee9a5c323cf9)
Casio fx-991EX keeps giving math error for simple calculations like ((1/2)/2) and sin inverse (10) etc. Any idea on how to fix this? Is there a chance that the calculator may be
![Amazon.com : Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Office Products Amazon.com : Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Office Products](https://m.media-amazon.com/images/I/71mCfR49bYL._AC_UF894,1000_QL80_.jpg)
Amazon.com : Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Office Products
![Mini-Math Lessons – fx-991EX and Functions – QR Codes and All! – Blog: Strategies, Resources, & EdTech Tips Mini-Math Lessons – fx-991EX and Functions – QR Codes and All! – Blog: Strategies, Resources, & EdTech Tips](https://casioeducation.files.wordpress.com/2020/04/2020-04-27_14-24-10.jpg?w=816)
Mini-Math Lessons – fx-991EX and Functions – QR Codes and All! – Blog: Strategies, Resources, & EdTech Tips
![Amazon.com : CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products Amazon.com : CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products](https://m.media-amazon.com/images/I/61+js1jv38L.jpg)