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Question About HP (Hewlett-Packard) Calculator HP-42S
invalid type message...

when I try to perform an operation I get an invalid type message. I have an HP 42S calculator. Example: 5 enter 3 x I get the invalid type message

Asked by dale on 07/22/2009 1  Answer

ManualsOnline posted an answer 15 years, 3 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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