Basic Calculation

	y > 0 : x ≠ 0, –1 x 10 100 <			1	log y <100

				x
	y = 0 : x > 0
	y < 0 : x = 2n+1, I/n, n is an integer.(n ≠ 0)
	but – 1 x 10 100 <	1	log l y l <100
		x
nPr, nCr	0 < n < 99, r < n, n,r are integers.

SD	l x l <1x10 50,l y l <1x10 50, l n l <1x10 100
(REG)	xσn, yσn, x, y, A, B, r : n ≠ 0
	xσn-1, yσn-1 : n ≠ 0,1

Error conditions

Error message will appear on the display and further calculation be- comes impossible when any of the following conditions occur.

Ma ERROR (1) When result of function calculations exceeds the range specified.

(2)You attempted to divide by 0.

(3)When your input values exceeds the allowable input range of function calculations

Stk ERROR Capacity of the numeric stack or operator stack is exceeded.

Syn ERROR You attempted to perform an illegal mathematical operation.

To release the above errors, please press [ ON/AC ] key.

☺Use the COMP mode for basic calculations.

Arithmetic calculation

•For negative values, press [ (–) ] before entering the value; You can enter a number in mantissa and exponent form by [ EXP ] key. See Example 6.

•Arithmetic operations are performed by pressing the keys in the same sequence as in the expression. See Example 7.

Parentheses calculations

•Operation inside parentheses are always executed first. SR-270IIcan use up to 15 levels of consecutive parentheses in a single calculation. See Example 8.

Percentage calculation

•[ 2nd ] [ % ] divides the number in the display by 100. You can use this key sequence to calculate percentages, add-ons, discounts, and per- centages ratios. See Example 9~10.

Display formats

This calculator has the following four display notation mode for the dis- play value.

Norm Notation :

This calculator can display up to 10 digits. However, values that exceed this limit are automatically displayed in exponential format. There are two types of exponential display formats : Norm 1 mode : 10 –2> l x l , l x l > 10 10

Norm 2 mode : 10 –9> l x l , l x l > 10 10

(Note) :All of the examples in this manual show calculation results using the Norm 1 mode.

Engineering Notation : ( ENG )

Calculation result is displayed using engineering notation, where the mantissa of the value is displayed with the number of decimal places specified and the exponent is set to a multiple of 3 for display.

Fixed Notation : ( FIX )

Calculation result is displayed with the number of decimal places specified.

Scientific Notation : ( SCI )

Calculation result is displayed using scientific notation, where the mantissa of the value is displayed with the number of decimal places specified.

•For FIX, SCI notation, the number of decimal places can be set to any value between 0~9. After specifying the number of decimal places, the display value will be rounded to the corresponding number of digits and displayed. When no specification has been made for the number of decimal places or significant digits, Norm 1 and Norm 2 mode can be carried. See Example 11.

•Pressing [ ENG ] or [ 2nd ] [ ] will cause the exponent display for the number being displayed to change in multiples of 3. See Example

12.

•Even if the number of decimal places is specified, internal calculation for a mantissa is performed up to 15 digits for SR-270II, and the dis- play value is stored in 10 digits. To round off those values to the speci- fied number of decimal places, press [ 2nd ] [ RND ]. See Example 13.

Citizen SR-270II manual Basic Calculation

Error conditions