# Keying In Negative Numbers; Chain Calculations In Alg Mode - HP 12C Platinum User Manual

Financial calculator.

Keystrokes
(ALG mode)
90.89}
65gr§12}
z3.5}
You can also do long calculations without pressing } after each intermediate
calculation: just press it at the end. The operators perform from left to right, in the
order you enter them.

## Keying in Negative Numbers (

The Þ key changes the sign of a number.
To key in a negative number, type that number and then press Þ.
To change the sign of an already displayed number, press Þ.
Keystrokes
(ALG mode)
OO
75Þ
§7.1}

### 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:
Appendix B: Algebraic Mode (ALG)
Display
} completes the calculation.
–13.54
96.75
New calculation:
Calculates 96.75 ÷ 3.5
27.64
)
Display
Clears any pending operations.
0.00
Changes the sign of 75
–75.
Multiplies –75 by 7.1
–532.50
750
x
12
you can enter either:
360
456
75
×
18
5 .
65 ×
68
1
9 .
243
12