12 Basic Scientific Calculator Skills Every Learner Must Know
Do you own fx 991 ES Plus Scientific Calculator? If you do, you should be familiar with these basic calculator skills.
Douglas Tawiah Dwumor
August 31, 2024
- To switch on the calculator, press the on-button once
- For general computation mode (COMP), press MODE 1
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How to Switch ON the Calculator
Press 
How to Switch OFF the Calculator
Press 
How to Enter General Computation (COMP) Mode
Press 
How to Reset the Scientific Calculator
Press 
How to Check Version of Scientific Calculator
- Press
simultaneously - Press
once and five times
How to change to MathIO and LineIO
- To set the calculator up in MathIO so that what you type will display like writing in a textbook, press . MathIO denotes Math Input Output
- To set the calculator up in LineIO so that what you type will display like the MS series, press
. LineIO denotes Line Input Output.
How to Switch ON the FREQUENCY in STAT Mode
Press 
How to Switch OFF the FREQUENCY in STAT Mode
Press
How to Set the Calculator in Degree Mode
Press
How to Set the Calculator in Radian Mode
Press
How to Set Calculator to View Answers in Mixed Fraction
Press
How to Set Calculator to View Answers in Magnitude and Bearing
Press
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