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 9and )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 tapping the Dkey as shown below.

Example: 123

+ 456 = 579

bcd+efgw

789

– 579 = 210

hij-Dw

210

⎟ 7 = 30

/hw*

*Starting a calculation expression with +, −, ×, ÷, or ^ operator will cause the “ans”

variable to be inserted automatically to the left of the operator, even if you do not tap the Dkey. For more information, see “Performing Continuous Calculations” on page 2-2-3.

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