HP HP12C hp 12c_user's guide_English_E_HDPMBF12E44.pdf - Page 21

Section 1: Getting Started 21 Keystrokes - 10.141053+ Display 21.68 11.54 1,064.54 Pressing - subtracts the number just entered from the number previously in the display. The calculator displays the result of this calculation, which is the balance after subtracting the second check. Keys in the next number and subtracts it from the previous balance. The new balance appears in the display. (It's getting rather low!) Keys in the next number - the paycheck deposited - and adds it to the previous balance. The new, current balance appears in the display. The preceding example demonstrates how the hp 12c calculates just as you would using pencil and paper (except a lot faster!): Let's see this happening in a different type of calculation - one that involves multiplying groups of two numbers and then adding the results. (This is the type of calculation that would be required to total up an invoice consisting of several items with different quantities and different prices.) For example, consider the calculation of (3 × 4) + (5 × 6). If you were doing this on paper, you would first do the multiplication in the first parentheses, then the multiplication in the second parentheses, and finally add the results of the two multiplications: File name: hp 12c_user's guide_English_HDPMBF12E44 Printered Date: 2005/7/29 Page: 21 of 209 Dimension: 14.8 cm x 21 cm