2-2-2

Basic Calculations

Using the ,Key

Use the ,key to input exponential values. You can also input exponential values using the

$key on the and keyboards.

Examples: 2.54 σ 103 = 2540

ADC,BU

1600 σ 10–4= 0.16

@E??$ CU

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 σσ(3 + b). Otherwise, your input is considered to be in function notation ( f (x)).

•In front of the ,key or $key (See “Using the ,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 tapping the #key as shown below.

Example: 123

+ 456 = 579

@ABCDEU

789

– 579 = 210

FGH #U

210

ω 7 = 30

FU*

*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 #key. For more information, see “Performing Continuous Calculations” on page 2-2-3.

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