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Negative sign

On a Casio calculator you can enter negative numbers with the key

(−)

 


Example 1

To calculate 5 × −2 = −10

 5  × (−)  2  =  5×-2
         -10.

 


Example 2

To calculate 2−1 = 0.5

 2  (−)  1  =  2-1
         0.5

 


Example 3

To store the value −123 in variable A

(−)  1   2   3      RCL (−)  -123→A
        -123.

 


Example 4

To calculate cos-1(−1) = π

  cos (−)  1  =  cos-1 -1
 3.141592654

 


Example 5

To calculate (−2)4 = 16

( (−)  2  )  4  =  (-2)4
          16.

When a calculation contains an argument that is a negative number, this negative number must be enclosed within brackets. The negative sign (−) is treated as a type B function, so particular care is required when the calculation includes a high priority type A function, or power or root operation.

 


Example 6

A negative sign cannot be used to perform a subtraction

 2  (−)  1   2-1_
           0.
=  Syntax ERROR
 

 


Example 7

To calculate 2 − − 1 = 3

 2  (−)  1  =  2− -1_
           3.

 


Example 8

To calculate 3 × 5 × 10−9 = 1.5 × 10−8

 3  ×  5  EXP (−)  9  =  3×5E-9
      1.5-08

 


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