HP 12C Financial 0012C-90001, 12C Financial 12C#ABA, 12C Financial F2231AA#ABA manual 1,064.54

		Section 1: Getting Started	21
Keystrokes	Display
-	21.68	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
	11.54	check.
10.14-		Keys in the next number and subtracts
		it from the previous balance. The new
		balance appears in the display. (It’s
	1,064.54	getting rather low!)
1053+		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	Page: 21 of 209
Printered Date: 2005/7/29	Dimension: 14.8 cm x 21 cm