Radio Shack 65-790 - Manual (Page 23)

23
CALCULATOR
To use the calculator, press .
Press the number keys in the order they
appear in the arithmetic operation. For
example:
To clear a calculation, press C/CE .
Notes:
• If the result of a calculation has
more than 12 digits, or if you try to
divide by 0,
E (error) appears. To
clear the error, press C/CE .
• If you enter a wrong number, press
C/CE and re-enter the correct num-
ber before you press = .
• Press +/– to change the displayed
number’s sign from positive to nega-
tive or negative to positive.
PERCENTAGE
CALCULATIONS
To do percentage calculations, follow
this example (to calculate 20 percent of
720
):
SQUARE CALCULATIONS
To do square calculations, follow this ex-
ample (to calculate 4
2 ):
MEMORY CALCULATIONS
The memory calculation feature lets you
easily perform multi-step calculations.
Use the following keys to perform mem-
ory calculations:
• Press MC to clear the memory.
• Press M+ to total a calculation and
add the total to the value in memory.
• Press M– to total a calculation and
subtract the total from the value in
memory.
• Press MR to recall (display) the
value in memory.
For example, to calculate (4
Ч
5) + (28 +
2) – (7 – 2) + (75
ч
5):
Note: M appears when a value is stored
in memory. M disappears when you
clear the memory.
You press: You see:
3 + 4 = 7
8
Ч
3 – 4 = 20
6
ч
2 = 3
You press: You see:
720
×
20 % 144
You press: You see:
4
×
= 16
You press:
The display’s last line
shows:
4
×
5 = M+ M 20.
28 + 2 = M+ M 30.
7 – 2 = M– M 5.
75
÷
5 = M+ M 15.
MR M 60.
65-790.fm Page 23 Monday, November 29, 1999 3:59 PM