Hp 48G Instrukcja Użytkownika Pobierz pdf (Strona 30)

Lesson 6: Doing Arithmetic

There are actually two different ways that you can “do" arithmetic on

the HP 48. The stack method is most convenient when you want to

perform immediate calculations involving one or more numbers. The

algebraic method is most convenient when you wish to describe your

calculation as a formula, (so that you can verify it or reuse it) before

evaluating it.

Stack Method

Look at an example of the way t.lie stack works during a calculation.

It works very mucli like the pencil-anfL])aper arithmetic taught in

elementary school. For example, to find the difference of two numbers

(such as 8.9 and 7.2), you first, write them Iroth onto the pairer and

1h( a

sid3tract:

8.^

'"TT

Using the stack for arithmetic on the HP 48 exactly mirrors the

manual process. Enter the numbers (or arguments) first, then perform

the operation.

Example: Subtract 7.2 from 8.9 on the HP 48.

Step 1: Enter the numbers. Notice that yon enter numbers in the

same order that you would write them on paper.

8.9 (ENTER) 1.2 (ENTER)

£■: 8.9

1 ■ “3 0

!_■

___

____

J* > C.

Step 2: Perform the subtraction. The subtraction operation removes

the objects on the first two stack levels (noting the order)

and returns the difference back to level 1.

0 1: 1.7

3-2 Arithmetic

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 115 116

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Hp 48G Instrukcja Użytkownika Strona 30