991ES

CASIO 991ES

The 991ES has been replaced by the fx-991EX

The Natural Display (Natural-V.P.A.M.) shows mathematical expressions like roots and fractions as they appear in your textbook, and this increases comprehension because results are easier to understand.

Find out more about the 991EX here

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Features

What you can do with a 991ES

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991es

Prime Factorisation

Display a number as a product of its prime factors.

991es

Recurring Decimal

Show a fraction as a recurring decimal or visa versa.

991es

Natural Display

Shows mathematical expressions like roots and fractions as they appear in your textbook.

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Emulator

For the big screen

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fx-ES PLUS Emulator

The fx-ES PLUS Emulator is a software program that emulates the operation of the fx-991ES, fx-83 GTPLUS and fx-85GTPLUS calculator

Find out more