HP HP12C hp 12c_user's guide_English_E_HDPMBF12E44.pdf - Page 20

20 Section 1: Getting Started Chain Calculations Whenever the answer has just been calculated and is therefore in the display, you can perform another operation with this number by simply keying in the second number and then pressing the operation key: you need not press \ to separate the second number from the first. This is because when a number is keyed in after a function key (such as +,-,§, z, etc.) is pressed, the result of that prior calculation is stored inside the calculator - just as when the \ key is pressed. The only time you must press the \ key to separate two numbers is when you are keying them both in, one immediately following the other. The hp 12c is designed so that each time you press a function key in RPN mode, the calculator performs the operation then - not later - so that you see the results of all intermediate calculations, as well as the "bottom line." Example: Suppose you've written three checks without updating your checkbook, and you've just deposited your paycheck for $1,053.00 into your checking account. If your latest balance was $58.33 and the checks were written for $22.95, $13.70, and $10.14, what is the new balance? Solution: When written down on paper, this problem would read 58.33 - 22.95 - 13.70 - 10.14 + 1053 Keystrokes 58.33 \ 22.95 - 13.70 Display 58.33 58.33 22.95 35.38 13.70 Keys the first number. Pressing \ separates the second number from the first. Keys in the second number. Pressing - subtracts the second number from the first. The calculator displays the result of this calculation, which is the balance after subtracting the first check. Keys in the next number. Since a calculation has just been performed, do not press \; the next number entered (13.70) is automatically separated from the one previously in the display (35.38). File name: hp 12c_user's guide_English_HDPMBF12E44 Printered Date: 2005/7/29 Page: 20 of 209 Dimension: 14.8 cm x 21 cm