# Adding Machine Calculator ( + - * / % )

 Total: 0.00 auto auto decimal + − × ÷
 Entry Sub-Total Total = 0.00

## Operation

You must have JavaScript enabled in your browser so that your cursor will reset inside the entry field after each entry. There is no need for using your mouse.

Once you get beyond 5 entries the ads and share buttons stop displaying so it should speed up for you.

auto decimal mode operates the same as auto mode but also assumes 2 decimal places so you do not need to enter a decimal point.  (Entry of 5236 = 5236/100 = 52.36, if you want to enter just 52.00 you must enter 5200 when in this mode).

For either auto or auto decimal modes, precede a value with +,-,* or / for addition, subtraction, multiplication or division. Default function is +.  If you just enter numbers then hit enter it will add them.

For any mode you can add a trailing % to cause the operand to be a percentage of the current total. For example, if the current total is 300 and you enter +20%, since 20% of 300 is 60, the operand will be 60 which will be added to 300.  The new total will be 360.

auto mode examples:

• Default mode is +
• 25 <enter> 25 <enter> 25 <enter> = 75
• (25+25+25=75)
• -25 <enter> -25 <enter> +25 <enter> = -25
• (-25-25+25=-25)
• 25 <enter> *25 <enter> /5 <enter> = 125
• (25*25=626 and 625/5=125)
• 25 <enter> *25 <enter> /5 <enter> +20% = 150
• (25*25=626 and 625/5=125 and 125+(20% of 125)=125+25=150)

This online calculator is useful for keeping a running total or "paper trace" when adding or subtracting money such as to balance a checkbook or doing your taxes or any other calculation where you want to double check your entries. It is not an actual paper tape but you can print the page to save your results. There is a limit of 50 entries.

As always, contact us if you have any ideas that can help us make this or any of our other calculators better for you!