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you depress the =, %, M+, M-, X or ÷ key. Each divisor entry is retained
as a constant (except M+ and M- entries) until you depress the X, ÷ or
Clear.
21. [=] Equal Key
To get the result in multiplication or division.
22. [X] Multiplication Key
The multiplication key performs multiplication, automatic constant
multiplication and intermediate sequential operations. It establishes the
amount entered or the prervious printed or printed/displayed amount
as a constant multiplicand. The X key also causes the calculator to
multiply when you depress the =, %, M+, M-, X or ÷ key. Each
multiplicand entry is retained as a constant (except M+ and M- entries)
until you depress the X, ÷, or Clear.
23a. [C/CE] Clear / Clear Entry Key
Model 1570-6
Clears a live entry by pressing this key once. Press twice to clear the
accumulator or pending calculation. Does not clear the Memory or
Grand total.
23b. [CE] Clear Entry
Model 1560-6 & 1530-6
Clears a live entry.
24. [TIME/DATE] Time and Date Display Key
Used to display or program the date and time. Depressing this key
once will cause the date to display, a second depression will display
the time. Holding the key down for three seconds will cause the date or
time to flash, this is the program mode.
25. [0]-[9], [00] & [•] Numeric Keys
The calculator uses the conventional 10-key indexing keyboard, and
includes the double zero key and decimal point key. Whole numbers
are entered exactly as they are written.
26. [−] Minus Key
Subtracts an amount from the accumulator. To subtract the same
amount more than one time (repeat subtraction), enter that amount
once and depress the Minus key as many times as necessary. If this
key is depressed immediately after [%] key, it works as percent minus
key.
27. [+] Plus Key
Adds an amount to the accumulator. To add the same amount more
than one time (repeat addition), enter that amount once and depress
the Plus key as many times as necessary. If this key is depressed
immediately after [%] key, it works as percent plus key.
28a. [IIT] Memory II Selector Key
Model 1570-6