by buttons.....
To power off the Citizen Calculator CT-555, simply press the "OFF" button located on the front panel. If the calculator is unresponsive, you can also remove the battery to turn it off. In case of a solar-powered model, covering the solar panel will effectively turn off the display. Always ensure to turn it off to conserve battery life.
press / * % and one time check & two times correct button
To power off an Orpat calculator, you typically need to locate the power button, which is usually labeled as "ON/OFF" or with a similar symbol. Press and hold this button for a few seconds until the display turns off or the calculator shuts down. Some Orpat calculators may also have an automatic power-off feature after a period of inactivity to conserve battery life.
the power key turns on and off
On a regular calculator, you just leave it it will off itself. On a scientific calculator, press shift AC.
On normal calculator, press 'Off'. If your calculator doesn't have this button, the calculator will turn off automatically after some time. On scientific calculator, press 'shift' and press 'AC'. (depends on your version of the calculator)
A solar power calculator harnesses solar energy from light, which is converted into electrical energy by the solar panel on the calculator. This electrical energy is then used to power the calculator.
you press off
/+*+%+check+2 times correct(delete)
press 2and 3 with on/ac switch for 2-4 sec and release on/ac then 2,3 the calc. is off
The company, Newegg, has an online site that provides a power supply calculator. Lifehacker is another online site that offers this type of calculator.
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