HP 15c Scientific manual For storage arithmetic, For recall arithmetic

44 Section 3: The Memory Stack, LAST X, and Data Storage

The number in the register is determined as follows:

For storage arithmetic,
			+
new contents	=	old contents	−	number in
of register		of register	×	display
			÷

R0

r

T

Z

Y

X Keys:

t

z

y

x

R0 r-x

O-0

T

Z

Y

X

t

z

y

x

Recall Arithmetic. Recall arithmetic allows you to perform arithmetic with the displayed value and a stored value without lifting the stack, that is, without losing any values from the Y-, Z, and T-registers. The keystroke sequence is the same as for storage arithmetic using l in place of O.

For recall arithmetic,

	+
new display = old display	−	contents of
	×	register
	÷

R0

r

T

Z

Y

X

Keys:

t

z

y

x

R0

l-0

r

T

Z

Y

X

t

z

y

x-r