User Manual

16 BA II PLUS™ Calculator

Permutations

computes the number of permutations of n items taken

r at a time.

−

()

Rounding

The round function is useful when you need to perform a

calculation using the displayed form of a number rather than

the unrounded value that the calculator stores internally. The

decimal format setting does not round the calculator’s

internally stored value, only the displayed value.

lets you change the internal value to match its

displayed form.

For example, in the Bond worksheet, you might want to round

a computed selling price to the nearest penny (two decimal

places) before continuing with your calculation.

Scientific Notation

If you compute a value that is larger or smaller than the

calculator can display in standard decimal format, the value is

displayed in scientific notation. A value in scientific notation is

displayed as a base value (sometimes called a mantissa),

followed by a blank space, followed by an exponent.

You cannot directly enter a number in scientific notation, but

when the AOS calculation method is selected, you can use the

;

key to enter a number in scientific notation.

For example, for 3

, key in

;

Internal value

After rounding

Before rounding

Displayed value