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Section 3: The Memory Stack, LAST X, and Data Storage
Example: Keep a running count of your newly blooming crocuses for two
more days.
Keystrokes
8 O 0
4 O + 0
3 O + 0
24 l - 0
l 0
Overflow and Underflow
If an attempted storage or recall arithmetic operation would result in
overflow in a data storage register, the value in the affected register will be
replaced with ±9.999999999×10
blinking (clear the overflow condition), press − or = or | " 9.
In case of underflow, the value in the register will be replaced with zero (no
display blinking). Overflow and underflow are discussed further on page
61.
Problems
1.
Calculate the value of x in the following equation.
x
Answer: 4.5728.
A possible keystroke solution is:
4 v 5.2 - 8.33 * | K 7.46 - 0.32 * ÷ 3.15
v 2.75 - 4.3 * 1.71 v 2.01 * - ÷ ¤
Display
8.0000
4.0000
3.0000
9.0000
15.0000
8.33
(4
5.2)
4.3
(3.15
2.75)
Places the total number of blooms as of
day 2 in R
.
0
Day 3: adds four new blooms to those
already blooming.
Day 4: adds three new blooms.
Subtracts total number of blooms
summed in R
0
number of plants (24); 9 crocuses have
not bloomed.
(The number in R
99
and the display will blink. To stop the
[(8.33
7.46)
0.32]
(1.71)
(2.01)
(15) from the total
does not change.)
0
45
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