# Hi i have the canon p170-DH and i cant subtract. example: 4-4= -8 not 0

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Hi....by looking at the date you posted this question, you may have already found the answer, but just in case you haven't......the procedure for adding and subtracting on these calculators is completely opposite of a regular calculator. On a regular calculator, you would input 4 - 4 = 0. On these type of calculators, a number's positive or negative status is keyed in AFTER the number, instead of before it. Therefore, you input 4 + 4 - (notice you DO NOT input = at the end, but if you are in print mode, you will need to hit your total key, which looks like an asterisk, where the = would normally be, in order for the final value of your calculations to print on the paper tape.

Multiplication and division equations are done exactly as they are on a regular calculator....4 x 4 = 16.

Hope this helps. If you have your owners manual, it should also give you some examples of how to perform calculations with your calculator.

Posted on Jan 17, 2009

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Posted on Jan 02, 2017

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## Related Questions:

### 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....

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

### Where is the time set key on canon p170-dh

Press the button to the right of the FEED button twice. The first time you press it will be for the Date, the second will bring up the time.

May 13, 2010 | Canon P170-DH Calculator

### Where is the constant factor key on a Canon P170-DH?

How to do constant multiplication or division on the Canon P170-DH calculator

This process actually requires fewer keystrokes than other calculators. Basically, just do the first problem
and then do the next items with just the next number and the EQUAL key. For example,

*** Constant Multiplication ***
2 (multiply key)
10 (= key)
(The answer 20 shows on the screen. Note, the 2 is still stored as a constant without doing anything, just continue)
4 = (shows the answer 8 on the screen)
20 = (shows the answer 40 on the screen)
100 = (shows the answer 200 on the screen)

*** Constant Division ***
10 (divided by key)
2 =
(shows the answer 5 on the screen, the 2 is still stored as a constant without doing anything, just continue)
100 = (shows the answer 50 on the screen)
500 = (shows the answer 250 on the screen)
4 = (shows the answer 2 on the screen)

Feb 26, 2010 | Canon P170-DH Calculator

### How do I perform multiple subtractions?

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

### Changing Ink in the Canon P170-DH Printing Desk Top Calculator?

The manual for the Canon P170-DH calculator is found on the canon usa web site. It is 22 mg in size, but prints out to 4 pages in English, Spanish and French.

According to the manual: Use only Ink Roller CP-13.
There are four figures showing the steps, so you'll have to imagine it.
1. Turn power switch off.
2. Remove the printer cover (Figure1).
3. Hold the tab of the ink roller. Lift the ink roller out of the base (Figure2).
4. Insert the new ink roller into position. Push down on the center of the ink roller until it locks into place (Figure3).
5. Replace the printer cover (Figure4).

Print out the manual for yourself and put it in a safe place.

Nov 20, 2008 | Canon P170-DH Calculator

### Canon P170-DH

Refer to the illustrated instruction on page 4 of the instruction manual available on the manufacturer's web site at http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=349&modelid=9785

Oct 17, 2008 | Canon P170-DH Calculator

### Setting tax rate on a canon P170-DH

To set the tax rate, slide the "GT" switch to RATE. Enter the tax rate (i.e., 4.5 for 4 1/2 %). The display should show 4.5 %. Slide the "GT" switch to OFF.

Jul 30, 2008 | Canon P170-DH Calculator

### Canon P170-DH calculator

Oct 15, 2007 | Canon P170-DH Calculator

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