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The NEWYES NY-991MS and CTIFREE fx-991ES PLUS calculators do not have a dedicated "FACT" button like the Casio FX-83GTX. However, you can still find prime numbers on these calculators. To find prime numbers: NEWYES NY-991MS: Press the "MODE" button. Choose "PRIME" from the list of options. Enter the desired number and press "=" to check if it's prime. CTIFREE fx-991ES PLUS: Press the "MODE" button. Select "TABLE" or "TABLESET." Input a starting point and an ending point, then observe the table for prime numbers. Although the techniques may vary from those used on the Casio FX-83GTX, they prove to be effective for prime number calculations on the designated calculators.
Casiodisplay format (Disp) settings while the calculator is in the BASE ... Be sure to checkthe current calculation mode (SD, REG,. COMP ... Use [ and ] to display the expression 4 + 4. Press A ... want to perform scientific function calculations. COMP .
The Casio fx-991ex succeeds the fx-991es (functionally identical to the ... Both are nonprogrammable nongraphing scientific calculators, with natural ... Side-by-side comparison of the fx-991EX and fx-991ES PLUS. ... Displays QR codes for smartphone use .... Work out a formula for many values of the input variables.
You should try to explore the calculator to find its capabilities. You can also read the manual. Everything is in it.
Press the Mode button, then the down arrow key. On the second page of the mode list you find 2:Verif
Write your equations first, then try to use the calculator to solve the problem. If you don't know how to do it by hand, you won't be able to ask the calculator to do it for you.
I would take it apart and see if they installed the display upside down. I wouldn't think the wires would be long enough to do this, but maybe that is the way it is laid out.
Hi, If you cannot find it, buy an FX-991ES. It is solar-powerd and it has the natural text-book display, which is a novelty in calculators. I know that Staples carry the FX-991ES.
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