3/Before Using The Calculator - Casio fx-180P Manual De Operación

3/ BEFORE USING THE CALCULATOR
Select the SD mode (press [3]) for standard deviation, the LR mode (press)
for regression analysis, the [dx mode (CD) for carrying out integral, and the RUN
mode ( [3) for ordinary arithmetic and functional calculations.
Select the LRN mode () to write a program.
Whatever angular unit is displayed does not matter in calculation which does not use
angular data.
I Precedence of operations and precedence levels
0 This calculator automatically evaluates precedence of operations and executes in the
proper sequence thus determined. The precedence of operations is as follows.
CU Functions Operations of the same precedence will be car-
©x', X5 ried out in the order of input. An expression
@Multiplication and division enclosed with a pair of parentheses will be given
@Addition and subtraction the highest precedence level.
0 Internal registers L1 to L6 are used to retain intermediate results of operations,
including expressions enclosed with parentheses, which have low precedence levels.
Therefore, intermediate results of up to six levels may be retained.
0 Up to three nested parentheses will be given the same precedence level. As a result,
parentheses can be nested up to 18 pairs.
' How to evaluate precedence levels (an example of 4 levels and 5 pairs of nested
parentheses)
Expression: 2X[{(3+4X{(5+4l+3})+5} +9]=
Entry operation: ngBSQQS4BE3E¢iB 58983
I
1 level 1 level 1 level 1 level ®
Contents of registers when x 4
entr has roceeded t
y p 0 Li (t5+
L2 4x
L3 ("3+
L x
4 2
LsT
Laj]
ICorrection
0 If you are aware of data entry error before pressing a command key, press and
re-input the correct data.
0 In a series of calculations, you can correct a wrong intermediate result of a functional
calculation or within nested parentheses: press and calculate the correct value,
then resume the interrupted sequence of calculations.
0 If you have pressed .B.B.B. 9 or g? by mistake, you may press the correct
key immediately. Note that, though the correct operation overrides the wrong one
designated first, the precedence of operation of the first command remains effective.