Casio ClassPad 300 PLUS - Manual (Page 99)

20050501
Using the e Key
Use the e key to input exponential values. You can also input exponential values using the
E key on the 9 and ) keyboards.
Examples: 2.54
× 10 3 = 2540
c.fe edw
1600
× 10
–4 = 0.16
bgaaE-e w
Omitting the Multiplication Sign
You can omit the multiplication sign in any of the following cases.
• In front of a function
Examples: 2sin (30), 10log (1.2)
• In front of a constant or variable
Examples: a
π
, 2ab, 3ans
• In front of an open parenthesis
Examples: 3(5 + 6), (a + 1)(b – 1)
Note that you must use a multiplication sign when the expression directly in front of the
open parenthesis is a literal variable. Example: ab (3 + b) must be written ab
× (3 + b).
Otherwise, your input is considered to be in function notation ( f ( x )).
• In front of the e key or E key (See “Using the e Key” above.)
• In front of a matrix or list
Examples: a {1, 2, 3}, 3 [[1,2] [3,4]]
Using the Answer Variable (ans)
Any time you execute a calculation in the Main application work area, the last result is
assigned automatically to a variable named “ans” (answer). You can even recall current “ans”
variable contents and input them into another calculation by pressing the D key as shown
below.
Example: 123 + 456 = 579 bcd+efg w
789 – 579 = 210 hij- Dw
210
÷ 7 = 30 D/hw
2-2-2
Basic Calculations