Casio fx-991ES PLUS - Manual (Page 13)

E-12
Transform the value 123 to engineering notation, shifting the decimal
point to the left.
123 123
$(k) 0.123×10 3
$(k) 0.000123×10 6
Calculation History
In the COMP, CMPLX, or BASE-N Mode, the calculator remembers up to
approximately 200 bytes of data for the newest calculation. You can scroll
through calculation history contents using
D and A.
1 + 1 = 2 1 1 2
2 + 2 = 4 2 2 4
3 + 3 = 6 3 3 6
(Scrolls back.) D 4
(Scrolls back again.) D 2
Note: Calculation history data is all cleared whenever you press , when
you change to a different calculation mode, when you change the display
format, or whenever you perform any reset operation.
Replay
While a calculation result is on the display, you can press B or C to edit
the expression you used for the previous calculation.
4 Ч 3 + 2.5 = 14.5 1 4 3 2.5 14.5
4 Ч 3 − 7.1 = 4.9 (Continuing) B&&&& 7.1 4.9
Note: If you want to edit a calculation when the indicator is on the right
side of a calculation result display (see “Reading the Display”), press
and then use B and C to scroll the calculation.
Answer Memory (Ans)
The last calculation result obtained is stored in Ans (answer) memory.
Ans memory contents are updated whenever a new calculation result is
displayed.
To divide the result of 3 s 4 by 30 1
3 4
(Continuing) 30
123 + 456 = 579 123 456
789 – 579 = 210
(Continuing) 789