Change it by removing the sliding lid on the back of the calculator behind the screen. The 12C uses one coin-size battery numbered CR 2032. Q: What batteries does the HP 12C use, and how do I change them? So, try that if your 12C seems to be stuck. I suggested that he briefly remove the batteries and try again. Note: I had a question from a reader who couldn't get his 12C to change the number of decimal places. For example, to display five decimal places, press f 5. Q: How do I change the number of decimal places that are displayed?Ī: Simply press the f key and then a number key. Note that after a reset, you will need to reset your customizations (such as the number of decimal places displayed). Pressing any key will clear that message. If you have successfully reset the calculator, then it will turn on and display Pr Error.You will need to hold down both keys for several seconds before releasing them. Hold down the − key while pressing ON.This is similar to the solution to the radix point solution above, but you need to hold down the − key instead. Q: How do I reset the 12C to its factory defaults? Obviously, the 12C was created with worldwide users in mind. Interestingly, as far as I can tell this has nothing to do with the side of the road on which you drive. For a complete list, see the decimal separator article on Wikipedia. Many other countries do exactly the opposite. and many other countries, we use a decimal point as the radix point (or decimal separator) and a comma as the thousands separator. Here is how to solve the problem:Ī little background on this. ![]() ![]() I wish I knew how people got themselves into this situation, because it seems unlikely that it could happen by accident. How do I fix this problem?Ī: This is easily the most commonly asked question. Q: My 12C is showing a comma instead of a decimal point. I will compile a list of the most frequently asked questions here. Over the years, I have received many questions about financial calculators. Are you a student? Did you know that Amazon is offering 6 months of Amazon Prime - free two-day shipping, free movies, and other benefits - to students? Click here to learn more
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