I can not get the calculator to do simple adding and subtraction.It adds when it should subtract.

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Big calculators work a little different than handheld calculators. Like the above commentor explained, if you have a basic "whats 100 minus 20?" You have to entered as 100 + 20 -- And when you hit the minus button at the end, it will give you the total. 100 is the positive number, and the 20 is the negative number that your subtracting. Also you can hit 20 -- 100 + and get the same total because you entering 20 as the negative and 100 as the positive, just in reverse.

Posted on Aug 24, 2009

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You must enter the plus or minus sign after each entry

If you want to add 100 + 20 you would type:

100 +

20

*

If you want to asdd 100 + (-20) you would type

100 +

20 -

*

Download the manual here:

http://www.casionz.co.nz/Site/Pronto/Files/user_manuals/hr100T%20USER%20MANUAL.PDF

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

the function buttons are labeled + and -

to add put in the number then press the + button then put in the next number and + and son for all the numbers you are adding up

to subtract put in a number then press the- button ,then put in the next number and press the - button and so on

to do a combination calculation put in a number then press the + button and so on until you come to a number that you want to subtract in which case you put in that number then press the - button and if the next number is to be added ,put the number in and press the + button

to add put in the number then press the + button then put in the next number and + and son for all the numbers you are adding up

to subtract put in a number then press the- button ,then put in the next number and press the - button and so on

to do a combination calculation put in a number then press the + button and so on until you come to a number that you want to subtract in which case you put in that number then press the - button and if the next number is to be added ,put the number in and press the + button

Oct 22, 2015 | Casio Office Equipment & Supplies

SUM means adding not subtracting. so if you were wanting to add the total (the sum) of the amounts of the hundreds and the tens would be 170 plus 130 which would be 300 but the remainder from subtracting 130 from 170 would be 40. That would leave the single units 5 minus 4 of which the remainder is 1. So, the remainder from subtracting 134 from 175 is the reminder of subtracting the one hundred from the one hundred which is zero added to the remainder of subtracting the tens (70 minus 30) which is the remainder of 40 plus the remainder of subtracting the units of 5 minus 4 which is 1. So you need to add the 0 and the 40 and 1 which is the remaining sum of 41.

Sep 19, 2014 | Office Equipment & Supplies

Moisture damage if exposed to humidity

Jul 24, 2014 | Canon MP11DX Desktop Calculator, 12-Digit...

It looks like it may have adding machine logic.

Do this key sequence:

5 + 5+ 6-. Is the answer 4?

Each number you enter is positive or negative and it is just keeping a running total, rather than adding and subtracting numbers.

Let me know if this helps.

Good luck.

Paul

Do this key sequence:

5 + 5+ 6-. Is the answer 4?

Each number you enter is positive or negative and it is just keeping a running total, rather than adding and subtracting numbers.

Let me know if this helps.

Good luck.

Paul

Jul 22, 2014 | Sharp EL-2630PIII Desk Calculator 12-Digit...

Hi there,

Remember that the SHARP calculator does not solve algebra.

But some tips for adding and subtracting monomials include:

Group all the terms that are like terms (they have the same variables and exponents. Make sure that you move them with the sign in front of them (dont lose your minuses).

Add or subtract just the numbers in front of the terms and leave the variables exactly as they are when you write down the answer.

Remember that the SHARP calculator does not solve algebra.

But some tips for adding and subtracting monomials include:

Group all the terms that are like terms (they have the same variables and exponents. Make sure that you move them with the sign in front of them (dont lose your minuses).

Add or subtract just the numbers in front of the terms and leave the variables exactly as they are when you write down the answer.

Feb 20, 2014 | Sharp el-531x scientific calculator

To subtract 15% from something, what I do is take the price of the item (let's say it costs $100), then multiply it by 0.15 (which is equivalent to 15%). 100 x 0.15 gives you 15. Then, you'd take that number (15) and subtract it from the $100 to get $85, which is 15% off of $100.

Mar 05, 2011 | Canon Office Equipment & Supplies

If your calculator is more of an adding machine it works a little bit differently than a calculator. For an example: 10 + 5 - 2 on your machine do the addition of 10 + 5, then to subtract the 2 press 2 then the minus sign to get the total of 13. I hope this is helpful.

Feb 06, 2011 | Canon Office Equipment & Supplies

use the + key after each number to add the total will appear on screen. When all numbers have been added, enter number to subtract and then press - key. The subtracted number will appear in read on the paper (if two color). and then press the star key to get total.

Jul 08, 2010 | Canon P23-DHV Calculator

When you want to complete a problem on an adding machine, such as "7 - 3," you would not key in "7," then the subtraction sign, then "3" and then an equal sign. If you do, then you will get an answer of "-4," and you know that is not the correct answer. Again, you have to think like an accountant when you are working with your adding machine. To figure this subtraction problem on an adding machine, you would need to key in "7," the addition sign, "3" and then the subtraction sign; you would get the answer of 4. You are actually working the problem as "7 + (-3)." This would be true on most modern day machines. In order to subtract, you have to add the negative number.

Sep 25, 2009 | Victor 1208-2 Calculator

With an adding machine, which is what this is, you enter the number followed by the + or -. If you wanted to add 10+20, you would enter 10 then + then 20 then +. This would show your answer. If you are using the printer and you wish to see the final answer on the paper, hit the * key and your answer will print.

If you are subtracting, let's say 100-40, you would enter 100 then + then 40 then - then *. Adding machines expect you to enter long strings of numbers to total. You may have both positive and negative numbers. So, you always enter the number first followed by either positive + or negative -.

You might have 100 + 25 - 37 - 1 + 50. For that enter:

100+25+37-1-50+ then *

Different than a calculator but the same for all "adding machines". This machine should really be called an adding machine since that is the kind of input it is looking for.

If you are subtracting, let's say 100-40, you would enter 100 then + then 40 then - then *. Adding machines expect you to enter long strings of numbers to total. You may have both positive and negative numbers. So, you always enter the number first followed by either positive + or negative -.

You might have 100 + 25 - 37 - 1 + 50. For that enter:

100+25+37-1-50+ then *

Different than a calculator but the same for all "adding machines". This machine should really be called an adding machine since that is the kind of input it is looking for.

Jan 13, 2009 | Canon P23-DHV Calculator

May 22, 2014 | Casio HR-100TEPlus Calculator

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