Radio Shack 65-790 Calculator, Percentage Calculations, Square Calculations, Memory Calculations

65-790.fm Page 23 Monday, November 29, 1999 3:59 PM

CALCULATOR

To use the calculator, press .

Press the number keys in the order they appear in the arithmetic operation. For example:

You press:			You see:
3	+ 4 =		7
8 ⋅	3 – 4	=	20
6 ⎟ 2 =			3

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):

You press:	You see:
720 ⋅ 20 %	144

SQUARE CALCULATIONS

To do square calculations, follow this ex- ample (to calculate 42):

You press:	You see:
4 ⋅ =	16

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 ⋅ 5) + (28 +

2) – (7 – 2) + (75 ⎟ 5):

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.

Note: M appears when a value is stored in memory. M disappears when you clear the memory.

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