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Chain Calculations In Alg Mode; Parentheses Calculations - HP 12C Platinum User Manual

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26
Section 1: Getting Started

Chain Calculations in ALG Mode

To do a chain calculation, you don't need to press } after each operation, but
only at the very end.
For instance, to calculate
750 § 12 } z 360 } or
750 § 12 z 360 }
In the second case, the z key acts like the } key by displaying the result of 750
× 12.
Here's a longer chain calculation:
This calculation can be written as: 456 – 75 ÷ 18.5 × 68 ÷ 1.9. Watch what
happens in the display as you key it in:
Keystrokes
(ALG mode)
OO
456-75z
18.5§
68z
1.9}

Parentheses Calculations

In ALG mode, parentheses can be used in calculations to change the order in
which operations are evaluated. When there are pending open parentheses, the ( )
status indicator will be shown in the display. As open parentheses are closed, the
expression contained within the parentheses is evaluated, from left to right. The
final result of a calculation will be displayed when you press the ³ key, and then
any pending parentheses will be closed. You can't use more than 13 pending
(opened) parentheses at the same time.
For example, suppose you want to calculate:
Keying 8 ÷ 5 – 1 will calculate 8 ÷ 5 first and then the result (1.6) will have 1
subtracted from it (resulting in 0.6), which is not what is intended.
750
x
12
you can enter either:
360
456
75
×
18
5 .
Display
Clears any pending operations.
0.00
Subtracts 75 from 456.
381.00
Divides 381 by 18.5.
20.59
Multiplies by 68.
1,400.43
Divides by 1.9 and displays the
737.07
result.
8
5 (
) 1
68
1
9 .

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