I want to substract 15 per cent and is not accurate the substraction in this cannon p27 dh brand new. the same operation for adding 15 is ok

go to your browser search box type Instruction manual for Canon P27 -DH 12digit mini desk top printing calculator . on the page that appears you will see a PDF OF THE INSTRUCTION MANUAL. on the machine lift lid and the ink cartridge can be seen , you can lift the ink cartridge out and replace . Suggest download PDF just in chase .

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

the refrigeranterant charge is stamped on the unit data plate in ounces of freon. take this number and multiply it by 16 and get the pounds and the decimal point will need to be converted back to ounces. example 138 ounces equals 8.625 lbs of freon which is about 8 lbs and 8 0r 9 ounces. this is for a 15 foot lineset. measure your lineset and substract 15 , then take this number and add .6 per foot. .6 ounces of freon per foot of refrigerant line over 15 feet. you will have to use a quality digital scale to weigh in this total charge

The answer is 90. You must perform the operation in the following order: Multiplication and division first, then, addition and substraction as required.

Try these websites:
http://usa.canon.com/cusa/support/consumer/calculators/desktop_printing/mp27d#BrochuresAndManuals
http://www.generalmanual.com/Calculators/Canon-MP27D-Desktop-Printing-Calculator.htm
http://www.free-service-manuals.com/Calculators/Canon_Calculators/Canon_MP27D_Calculator_L12550/

The processor ic is breaking down and overtime will get worse until the calculator becomes unusable, there is no cost effective way to service this instrument, you are further ahead replacing it.

Hello,
I am not lecturing you but I would rather you understand how to do the manipulations involved in isolating a variable.
You want to isolate y, Ok
Start stripping it of all that is not y.

3y + 4x =6. (Addition is commutative, I can change the order of addition)
The term with y is added to 4x. If I want the term in y alone on one side I perform the inverse operation of addition, a substraction. I subtract 4x from both sides.
3y+4x-4x=6-4x. But 4x-4x=0, and we are left with

3y= - 4x+6

This operation is sometimes summarized as make one term change side while changing its sign

It would do no harm to put the right side of the foregoing equation in parentheses. I do that to avoid errors)

3y= (-4x+6).

Now y is multiplied by the number 3. To isolate y I have to perform the inverse operation of the multiplication, namely the division by 3

3y/3 =(-4x+6)/3. The left hand side is just y

y= (-4x+6)/3.

While result is correct, I can also open the parentheses
y= -4x/3 +6/3
y= -(4/3)*x +2.

Hope it helps.

1. it is easy
2. / is for divide
3. *is for multyply
4. -is for substract
5. +for plus
6. .for decimal
7. for calculater go to start-accessries-calcutater

needed a ink roller. I found it at Office Max.

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