2-2-2

Basic Calculations

Using the eKey

Use the ekey to input exponential values. You can also input exponential values using the Ekey on the 9 and ) keyboards.

Examples: 2.54 ⋅ 103 = 2540

c.feedw

1600 ⋅ 10–4= 0.16 bgaaE-ew

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: aπ, 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 ekey or Ekey (See “Using the eKey” 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+efgw

789

– 579 = 210

hij-Dw

210

⎟ 7 = 30

D/hw

20050501