Order of operations – CITIZEN SR-281N User Manual

Page 7

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File name : CBM_SR-281N_IB_English_black_v09330.doc

Date: 2009/3/30 Trimmed Size : 140 x 75 mm SCALE 1 : 1

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Running memory

You should keep the following rules in mind when using running
memory.

• Press [ M+ ] to add a result to running memory and the " M "

indicator appears when a number is stored in the memory. Press
[ MR ] to recall the content of running memory.

• Recalling from running memory by pressing [ MR ] key does not

affect its contents .

• Running memory is not available when you are in statistics mode.
• The memory variable M and running memory utilize the same

memory area.

• In order to replace the content of the memory with the displayed

number, please press [ X M ] key.

• To clear the content of running memory, you can press [ 0 ] [ X M ],

[ ON/C ] [ X M ] or [ 0 ] [ STO ] [ M ] in sequence.

¾

[ ( 3 x 5 ) + ( 56 7 ) + ( 74 – 8 x 7 ) ] = 41

DEG

0 [ X M ]

0 .

DEG

7 4 – 8 ¼ 7 M +

3 [ x ] 5 [ M+ ] 56 [ ] 7 [ M+ ] 74

[ – ] 8 [ x ] 7 [ M+ ]

M

1 8 .

DEG

M

[ MR ]

M

4 1 .

DEG

0 [ X M ]

0 .

(Note) : Besides pressing [ STO ] or [ X M ] key to store a value, you

can also assign values to memory variable M by [ M+ ].
However, when [ STO ] [ M ] or [ X M ] is used, previous
memory contents stored in variable M are cleared and
replaced it with the newly assigned value. When [ M+ ] is used,
values is added to present sum in memory.

Order of operations

Each calculation is performed in the following order of precedence:

1) Fractions
2) Expression inside parentheses.
3) Coordinates transformation ( P R , R P )

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