User Guide

238 Appendix B: Algebraic Mode (ALG)
File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 238 of 275
Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm
Keystrokes
(ALG mode)
Display
90.89
}
–13.54
}
completes the calculation.
65
gr§
12
}
96.75
New calculation:
1265 ×
z
3.5
}
27.64
Calculates 96.75 ÷ 3.5
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.
z To key in a negative number, type that number and then press Þ.
z To change the sign of an already displayed number, press Þ.
Keystrokes
(ALG mode)
Display
OO
0.00
Clears any pending operations.
75
Þ
–75.
Changes the sign of 75
§
7.1
}
–532.50
Multiplies –75 by 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
360
12x750
you can enter either:
z 750 § 12 } z 360 } or
z 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:
9.1
68
5.18
75456
×
−
This calculation can be written as: 456 – 75 ÷ 18.5 × 68 ÷ 1.9. Watch what
happens in the display as you key it in: