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Section 1: Getting Started 25
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 25 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
Storage register arithmetic is possible with only registers R
0
through R
4
.
Example:
In the example on page 20, we updated the balance in your
checkbook. Let’s suppose that because data is stored indefinitely in your
calculator’s Continuous Memory, you keep track of your checking account balance
in the calculator. You could use storage register arithmetic to quickly update the
balance after depositing or writing checks.
Keystrokes Display
58.33?0
58.33
Stores the current balance in register
R
0
.
22.95?-0
22.95
Subtracts the first check from the
balance in R
0
. Note that the display
continues to show the amount
subtracted; the answer is placed only
in R
0
.
13.70?-0
13.70
Subtracts the second check.
10.14?-0
10.14
Subtracts the third check.
1053?+0
1,053.00
Adds the deposit.
:0
1,064.54
Recalls the number in R
0
to check the
new balance.
25


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