Citizen Systems SR-260N Basic calculation, Mixed arithmetic calculation, Parentheses calculations

Basic calculation

Before performing the following calculation, check to see that your calculator is in decimal base and floating point display.

Mixed arithmetic calculation

1 + 2 x 3 = ?	1 [ + ] 2 [ x ] 3 [ = ]		DEG
		7.
– 3.5 + 8 ⎟ 2 = ?	3.5 [ +/– ] [ + ] 8 [ ⎟ ] 2 [ = ]		DEG
		0. 5

Parentheses calculations

Operation inside parentheses are always executed first. You can use up to 15 levels of parentheses in a single calculation. When the first parenthesis is opened, the “ ( ) ” indicator appears and remains in the display until the last parenthesis is closed.

( 5 – 2 x 1.5 ) x 3	[ ( ] 5 [–] 2 [ x ] 1.5 [ ) ] [ x ]			DEG
+ 0.8 x (– 4 ) = ?	3	[ + ] 0.8 [ x ] 4 [ +/– ] [ = ]	2.		8
2 x { 7 + 6 x ( 5 +	2	[ x ] [ ( ] 7 [ + ] 6 [ x ] [ ( ]		DEG
4 ) } = ?	5 [ + ] 4 [ = ]		1 2		2.

(Note) : It is unnecessary to press the [ ) ] key before the [ = ] key.

Constant calculation

The calculator enables you to repeat the last number entered or the last operation executed by pressing [ = ] key.

Repeating the last number

3 x 3 = ?

3 x 3 x 3 = ?

3 x 3 x 3 x 3 = ?

3 [ x ] [ = ]		DEG	9.
[ = ]		DEG
	2		7.
[ = ]		DEG
		8	1.

Repeating the arithmetic operation

321 + 357 = ?			321 [ + ] 357 [ = ]		DEG	6	7	8.
654 + 357 = ?			654 [ = ]		DEG
				1		0	1	1.
579 – 159 = ?			579 [–] 159 [ = ]		DEG	4	2	0.
456 – 159 = ?			456 [ = ]		DEG	2	9	7.
18 x 45 = ?			3 [ x ] 6 [ x ] 45 [ = ]		DEG	8	1	0.
18 x 23 = ?
			23 [ = ]		DEG	4	1	4.
18 x (0.5 x 10	2	)
					DEG
= ?			0.5 [ EXP ] 2 [ = ]			9	0	0.
			E8
SR-260N_English_090324.rtf			SIZE: 135x75mm / SCALE 2:1 / 2009/3/24