HP user manual User's Guide download pdf (Page 36)

Getting Started28

For example, to calculate 1 + (2 x 3), you may enter the problem as written from left to right,

with parentheses to prioritize the multiplication operation. When entered with parentheses,

this expression returns a result of 7.

Calculations in Algebraic Mode

In Algebraic mode, multiplication and division have a higher priority than addition and

subtraction. For example, in Algebraic mode, pressing J1GPD4 returns a

result of 7.00. In Chain mode, the same key presses return a result of 9.00.

In Algebraic mode, operations between two numbers have the following priority:

• Highest priority: combinations and permutations, T probability calculations, % change, and

date calculations

• Second priority: the power function ( )

• Third priority: multiplication and division

• Forth priority: addition and subtraction.

The calculator is limited to 12 pending operations. An operation is pending when it is waiting

for the input of a number or the result of an operation of higher priority.

Using Parentheses in Calculations

Use parentheses to postpone calculating an intermediate result until you’ve entered more

numbers. You can enter up to four open parentheses in each calculation. For example,

suppose you want to calculate:

If you enter D:agVA, the calculator displays the intermediate result, 0.35.

This is because calculations without parentheses are performed from left to right as you enter

them.

To delay the division until you’ve subtracted 12 from 85, use parentheses. Closing parentheses

at the end of the expression can be omitted. For example, entering 25 ÷ (3 × (9 + 12 = is

equivalent to 25 ÷ (3 × (9 + 12)) =.

If you type in a number, for example, 53, followed by the parenthesis symbol, the calculator

considers this implicit multiplication.

Example

Table 2-8 Using parentheses in calculations

Keys Display Description

D:a\qgVA

85.00 No calculation yet.

JG\n

73.00 Calculates 85 - 12.

85 12–()

----------------------

9×

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 186 187

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HP user manual User's Guide Page 36