Are you puzzled by how to switch off your solar-powered CT-512 calculator without a Power button? Although it automatically shuts down after a period of inactivity, you can force it to turn off instantly by pressing a specific combination of keys. Keep reading to discover how!
Steps

To turn off, press the ÷ key. Locate the 'Divide' button on the right side of the calculator, adjacent to the number pad.

To power off, press the x key. Spot the 'Multiply' button on the right side of your calculator, near the number pad.

To activate the 'Percentage' function, press the % key. Look for the 'Percentage' button situated on the right side of your calculator, alongside the number pad.

To use the 'Check' feature, simply press the Check key. You'll find the 'Check' button positioned in the upper left corner of your calculator.

To activate the 'Correct' function, press the Correct key. This button, labeled 'Correct' and 'Delete', is situated next to the 'Check' button.

Press the Correct key once more. After pressing it for the second time, your calculator will power off.
Tips
Various calculator brands may have different methods for turning them off, including the CT-512. If you own a different model, consult your user manual or read about how to power down a standard school calculator.