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When rounding, we always look at the number in the position directly to the right of the position we are interested in. In this case, the whole dollar is the number immediately to the left of the decimal, so we look at the number immediately to the right of the decimal. If this number is 5 or more, we add 1 to the number to the left of the decimal. If the number to the right of the decimal is 4 or less, we do not add 1 to the number to the left of the decimal.
In this case, the number is 4, so it rounds down to 0.
If you want all entries and answers to have two numbers after the decimal, you should have a lever or slide that shows F,6,3,2,1,0. Some also show Add. Set the lever on the 2 or add. F means floating decimal. the others indicate how many numbers after the decimal.
The selector you are asking about is the "decimal selector". The result displayed/printed, will be in a format according to the position that you have selected as follows:
f = floating (the result will be in the number of decimal places that were entered on the keyboard
4= fixed 4 decimal places (x.0000)
3= fixed 3 decimal places (x.000)
2= fixed 2 decimal places (x.00)
0= fixed 0 decimal places (x)
add 2= (add mode*,fixed 2 places) ($.00)
Note* "ad mode" automatically enters the decimal place when entering the number on the keyboard. If you enter "123", the displayed ammount will be "1.23". If you enter "1", the display will read ".01". This is a useful setting when adding a list of numbers in a dollars/cents format, however, be careful, if entering a whole dollar ammount "three dollars" be sure to enter the decimal point, or enter the number as "300". If you don't, the result will be ".03", instead of the 3 dollars you intended.
Calculation results will be displayed using fractions, r, and ?. When you press CHANGE, the display will cycle through the following display styles: • Mixed fractions (with or without ?) ? improper fractions (with or without ?) ? decimal numbers • Proper fractions (with or without ?) ? decimal numbers.
To save paper you can only print what is displayed, even
in non-print mode.
Pressing after the entry of a number will print the entry
with the symbol “#” even in non-print mode.
Pressing will insert a separator into a number entry
such as a code, date, etc. Separators are displayed as a
period and dashes but printed as periods.
MEMORY + KEY / PRINT ON / OFF KEY:
Pressing selects print mode or non-print mode.
Cause the calculator to operate in a display / print or
display only mode, depending upon the calculator’s
“P” on the display: Print mode.
“NP” on the display: Non-print mode.
MEMORY – KEY / DECIMAL SELECTION KEY:
Pressing sets the number of decimal places in
“F” on the display:
The answer is displayed in the floating decimal system.
“3, 2, 1, 0” on the display:
Presets the number of decimal places in the answer.
“A” on the display (Add mode):
The decimal point in addition and subtraction entries is
automatically positioned to the 2nd digit from the lowest
digit of entry number. Use of the add mode permits
addition and subtraction of numbers without entry of
the decimal point. Use of , and will
automatically override the add mode and decimally
correct answers will be printed.
Hello The floating point number display (FIX) is set to zero decimal digits. All your. numbers with decimal parts are rounded. Look for a key that says [FIX]. Press it and enter a number say3 If I guessed right (Sharp makes numerous calculators) your numbers will show 3 decimal digits.
If there is no such key look for a [MODE] Button. Press the button. If you have a new screen with differents choices look for Format, Float, On some older calculators there is a table below the display. At the left of the table one finds MODE--> or -->MODE If it says there Mode DEG:4 that means to have angles in degrees you enter [MODE].
I think I exhausted all possibilities. Without you model number, I cannot do more.
Check the Decimal / Add Selector. It shoul be set to "A" (Add mode), to permit addition and
subtraction of numbers without entry of the decimal point.
You may also want to download the SHARP EL-1801P Operation Manual
Your calculator has a decimal counter (top center of calculator starting with the letter F654321A) for lack of a better name for it. Anyway mine is set at A. It puts the decimal in for me. I hope this helps you. if you haven't figured it out by now.
You need to be in add mode, and have 2 decimal places selected for the result. To change to add mode, make sure the 'K . A' switch is in the 'A' position. To get 2 decimal places in the answer, move the selector in the 'F 6 3 2 1 0' switch to the '2' position.