Question about Canon P23-DHV Calculator
Every time I try to calculate 1000-490= It turns the 1000 into -1000 and will not do the calculation at all unless I punch it in like 1000-490+= but then the answers are all negatives.
Yeah, this calculator is kind of odd in that the keys to the left of the numbers ([÷], [×] and [=]) work more like standard calculators, but the keys to the right ([-] and [+]) work more like they're RPN (more common on HP calculators). To calculate 1000-490, type "[CE/C] 1000 [+] 490 [-]". What happens is this: after clearing then entering 1000, the [+]adds it to the last result (in this case 0), giving us 1000. This number is saved when you enter 490, and pressing [-] subtracts it from the last result (1000), giving you 510.
Posted on Feb 14, 2007
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