![]() The incredibly high definition screen and multi-line display options make it easy to enter calculations and see answers in textbook style and clarity - be they with fractions, brackets, surds (roots), or any combination. Some of the new features that make this compelling for me are as follows: As a user of casio calculators, I am confident that the fx 991 ex is quite possibly the best classroom calculator they have ever produced.Īimed squarely at the Secondary school, this would be the calculator of choice for any student.
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