![]() ![]() If your calculator fails the self-test, before concluding it is defective, try running the self-test several times. Self-test: if none of the above solves the problem, you can test the calculator using its self-test feature.However, your calculator won’t start to give wrong answers as the batteries run out! See your HP 10B/10BII owner’s manual for instructions on how to replace the batteries. Batteries: if the batteries are dying, your calculator screen will dim and eventually a little battery symbol will show in the bottom right corner.You should put your calculator in “floating decimal” mode which shows the most significant decimals possible – press shift DISP. You don’t want this setting because some calculations require a lot more accuracy and in others you need to be able to decide rounding for yourself. If you have the calculator set to show, say, 2 decimal places, it will automatically round off answers to the nearest cent. ![]()
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