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Using the, E key -2-2, Using the e key – Casio ClassPad 300 PLUS User Manual

Page 99: Omitting the multiplication sign, Using the answer variable (ans)

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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