Electronic Filing and Calculating. History of Calculators. In Ancient Times the abacus was the main aid to calculation. Instrument used beads that slid along a series of wires or rods set in a frame to represent the decimal places. Probably of Babylonian origin.
Your goal is to use the correct finger to tap a key without looking at the keypad.
Strike is used to indicate keys and functions whose locations on the calculator do not easily lend themselves to the touch method.Tap vs. Strike
The textbook will use the acronym “DTC” to indicate desktop calculator.
P·IC-Print Item Count function
GT—Grand Total function
A—Add Mode Function
↑ answer is rounded up
↓ answer is rounded down
6, 3, 2, 1, 0—Decimal selectorCalculator Functions
Plus Key is used to enter addends.
Look for the [+=] key.
Use the Minus Key to remove addends for incorrect entries.
Look for the [- =] key.
Use the Total Key to print or display the answer to a problem.
Look for the Total [*] key.
See page 6 for finger position.
Use this feature when calculating multiple addition and subtract problems.
(3 thousands, 6 hundreds, 9 tens, 2 ones)
(1 tenths, 9 hundredths, 8 thousandths, 3 ten thousandths)
You must key in the decimal point.
The process of finding the difference between the minuend (the top or first number in the problem) and the subtrahend (the number being subtracted from the minuend).
When calculating sum or difference, tap [*] total key before striking [M+] or [M-] key.