HP 33s Scientific manual Recall Arithmetic, Result 3 That is, x

A

T

Z Y X

15

t

z

y

3

A

T

Z Y X

12

t

z

y

3

Result: 15 3

that is,A x

Recall Arithmetic

Recall arithmetic uses L ›, L …, L z, or L q to do arithmetic in the X–register using a recalled number and to leave the result in the display. Only the X–register is affected.

New x = Previous x {+, –, ⋅, ⎟} Variable

For example, suppose you want to divide the number in the X–register (3, displayed) by the value in A(12). Press LqA. Now x = 0.25, while 12 is still in A. Recall arithmetic saves memory in programs: using L›A (one instruction) uses half as much memory as LA, ›(two instructions).

A

12

A

12

T

Z

Y

X

Example:

t

z

y

3

T

Z Y X

t

z

y

0.25

Result: 3 12

that is, x12

Suppose the variables D, E, and F contain the values 1, 2, and 3. Use storage arithmetic to add 1 to each of those variables.

Storing Data into Variables 3–5