Sharp el-9950

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Chapter 3: Manual Calculations
3. Arithmetic Keys
There are various keys for arithmetic calculations. Use the
+
- | =
,
_
,
(
and
)
keys to perform
basicarithmeticcalculations.Press
E
to solve an equation.
E
Executes an expression.
Example
• Calculate1+2.
# C
1
+
2
E
Anexpressionisamathematicalstatementthatmayusenumbers
and/orvariablesthatrepresentnumbers.Thisworksjustlikea
regularwordsentence;onemayask“howareyou?”,andyoumay
answer“okay.”Butwhatifanincompletesentenceisthrown,such
as“howare”?You’llwonder,“howare...what?”;itjustdoesn’tmake
sense.Amathexpressionneedstobecompleteaswell.
1
×
2
,
4x
,
2sinx
×
cosx
form valid expressions, while “
1
×
”and“cos”donot.If
an expression is not complete, the calculator will display an error
message upon pressing the
E
key.
+
 Entersa“+”signforaddition.
Example
• Calculate12+34.
# C
1 2
+
3 4
E
-
 Entersa“–”signforsubtraction.
Example
• Subtract21from43.
4 3
-
2 1
E
4. Press505.8
|
36.
Press
E
to execute the
calculation.
Performing
addition,
subtraction,
multiplication
and division
A Note about
expressions