Question about Canon P170-DH Calculator

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Cannot find the constant key for multiplication

On 10-key calculators you can press the x key twice to turn on the constant feature. How do you do that on this calculator

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

This process actually requires fewer keystrokes than most 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)

Also note! There is no K visible on the screen to indicate a constant is set.

Posted on Feb 03, 2011

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1 Answer

Where is the constant key on the key board?

Turns out to be the = key. I just double-checked it and it's true.
Do a calculation like 10 divided by 2. Every time you enter a number and then hit the equal key, it will be divided by 2.

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How do I set a constant for division?

On some calculators there is a key marked with K (on the key or around it on the calculator face).
Try entering the divisor then the division key then press K. If that does not work try another order.
On some other calculators you press the operation key twice. Try entering the divisor first then press the division key twice. The next number you enter will be divided by the one enter before pressing the operation key. (divisor).

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Try pressing an operation key twice.
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This is so easy but I've forgotten. I have an old manual Casio caluculator. I just want to divide a series of numbers by 4. I can't seem to figure out how to do it. Any ideas? Thanks, Julia

If your calculator has the capabilities to do constant calculations here is how you perform calculations with a constant.

  1. Enter the constant (4)
  2. Press the operation key (/) once.
  3. Press the operation key (/) a second time.
  4. Your calculator may show a k in its display (LCD)
  5. To divide a number by 4, enter the number and press =
  6. To divide another number by the constant (4) , Enter the number and press =
  7. Keep entering the dividends and pressing =
I hope it works for you.

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pKa= - log_10(Ka) where log_10 is the logarithm in base 10.

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Although the right parenthesis is not required in this particular case, it is better to accustom oneself to close the parenthesis.

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NOt exactly a problem as my Casio SL-1100TV calculator works fine. What I am trying to find out more about is the 'K' function, when you can press the + button twice and it carries over the number that...


If you have say to multiply 100 numbers by one single multiplier ( you have 100 multiplications to perfom) you use the Constant function abbreviated to K.

This is how you go about it
in a*b , a is called multilpicand, b is the multiplier.
You enter the multiplier (6) then you press twice on the multiplication key. You are ready to repeated the some operation but with a different multiplicand
You enter the first mutiplicand then you press = (or enter) the result is displayed.
Every number you are going to enter will be multiplied by 6
[6][*][*] -------constant multiplication with 6 as multiplier, Then
[5][=/ENTER/EXE] yields 30
[6][=] yields 36
[0.5][=] yields 3.

Be careful!! If you do not enter a new multiplier and just press [=] the calculator uses the last calculated result as the multiplicand. (On certain calculators, the last result is stored in a register called Ans (short for answer.)

What I described for the multiplication is valid for any arithmetic operation. Thus
[6][+][+] is constant addition with 6
[18][/][/] is constant division with 18 as divisor.

Hope it helps

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