Question about Canon P23-DH Calculator

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How do you do basic subtraction?

Every time i sue the minus key and then the equals key - i never get the correct answer. what am i doing wrong?

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Re: how do you do basic subtraction?

Equals is used during a calculation of division, percentage, multiplication, etc. Use the total key or * key for a total of substraction or addition.
If this helps, please rate me. Thanks, Patty

Posted on Jan 04, 2008

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Re: how do you do basic subtraction?

You have to press + sign to get the answer on the screen. It won't print substraction answers. This is a totally weired calaculator.

Posted on May 24, 2010

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How do you do long division

Let's do an example, outlining all the steps.

528 divided by 6
6)528 does 6 go into 5. How many times does 6 go into 52. So put
48 the 8 above the 2. Next multiply 8 times 6 and put the answer
---- under the 52. Subtract 48 from 52. Write the 4 under the 8 in
48 48. Now bring down the 8 from the 528. How many
48 times does 6 go into 48. 8 times. Write the 8 above the 8
--- in 528. Multiply 6 by 8 and write the answer under 48, and
0 subtract from 48 leaving 0.

Let's check to see if we did it correctly. Does 88 times 6 equal 528? Yes. So we have confirmed that we did it correctly.

Good luck.


Oct 04, 2014 | Calculators

1 Answer

Luke wants to find the difference 175 - 134. He has subtracted the hundreds and tens so far. What is the sum of the two numbers he has subtracted? How much does he still need to subtract?

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 | Calculators

1 Answer

Answer always appearing

Minus and change-sign are two completely different things. Minus is used to subtract one number from another. When you press minus when the input line is empty, your telling the calculator to subtract. The only way it can subtract the number you're about to put in is to subtract it from something else, and that something else is the previous answer, hence the "Ans."

If you want to input a negative number, use the change-sign key. If you want to subtract one number from another number, use the minus key.

Try pressing the plus key when the input line is empty. You'll get Ans+ in this case as well, The same with multiply and divide, among others, and for the same reason.

Sep 23, 2013 | Texas Instruments TI-84 Plus Calculator

1 Answer

Casio FX-115ES Scientific Calculator

I have done the calculation using the the shortcut key [x10^X] to enter the exponent,and I got the correct result.
I also did the calculation by explicitly typing the 10^10 factor and I obtained the correct result.
The syntax error may come from your using the minus - sign for subtraction rather that the change sign key (-)

Apr 06, 2012 | Casio FX-115ES Scientific Calculator

1 Answer

I do not have the manual. If I want to add or subtract do I put the total amount in and than hit the plus or minus key ? i.e., $128,000 -10000. do I hit the minus before the amount or after? -1500....

You can download the manual from

128000 - 10000 then press = or chain the calculation by pressing + or - and the number you want to add or subtract.

Sep 30, 2010 | Canon P170-DH Calculator

1 Answer

I am unable to subtract

The way to do math on this calculator is a bit different than on others. To start off, when doing subtraction, you must press the + key. This tells the calculator that you are working with a positive number.

Say you have $588.43 in you check book but you spent $136.92. The buttons you press on the calculator will be as follows:

588.43 + 136.92 -

The positive total of 451.51 will be on your screen. If you are using the print function as a way of keeping track, press # to print the on screen total.

Just remember, enter your first number and hit +. After this, each number that you are subtracting will have a - behind it.

Mar 04, 2010 | Canon P170-DH Calculator

1 Answer

How do I perform multiple subtractions?

1. Enter your beginning balance
2. Press the minus (-) key
3. Enter the amount of a check
4. Press the equal (=) key. Balance will be displayed.
5. Press the minus (-) key
6. Enter the amount of a check
7. Press the equal (=) key. Balance will be displayed

Repeat steps 5 through 7 as necessary.

To enter a deposit:

5. Press the plus (+) key
6. Enter the amount of the deposit
7. Press the (=) key. Balance will be displayed

Don't press any other keys (i.e., Clear) until you have completed all checks and deposits.

Jan 28, 2010 | Canon P170-DH Calculator

1 Answer

How do you subtract on this calculator? if I do 10 minus it puts that minus in front of 10 and it can not subtract?

Its a little strange. Suppose you want subtract 10 from 38. Do this:
Enter 38 press plus key.
Enter 10, press minus key.
Press the equal sign. You will have the result.

Oct 05, 2009 | Canon P23-DH Calculator

1 Answer

I can't seem to do simple subtraction with my Victor 1208-2. When I subtract say 5-4, I get a negative 9. Is there a setting or do I need to press something different to get simple subtraction to work?

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

1 Answer

How do I enter 10 to the power of -9.42 on the calculator?

No. You computed 10^1 - 9.42 which is 10 - 9.42 = .58

Instead of the minus key, which subtracts one number from another, use the change-sign key [+<>-].

[1] [0] [y^x] [9] [.] [4] [2] [+<>-] [=]

or else

[9] [.] [4] [2] [+<>-] [2ND] [10^x]

Jan 24, 2009 | Texas Instruments TI-30XA Calculator

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