Question about Canon P23-DH Calculator

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SPL-P100 calculator problem

I cannot get my calculator to NOT round up or down when doing ANY kind of math on it, ie: 15 divided by 2 does not equal 7 however that's the answer I get. I need it to post answers and figure with 2 decimal places. How do I get the settings to this? I do not have a book with this calculator as it was here at the job from the previous employee.

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There is a tab button that controls the amount of decimal places you would like. press tab and it will change to 0-2-3-4-A-F showing on the bottom of the screen.

It works. :-)
Joe Stogrin

Posted on Jul 09, 2008

  • 1 more comment 
  • Rosemary Mullan
    Rosemary Mullan Dec 29, 2011

    Dear Joe Stogrin -- Thanks so much for adding the answer to this question. I was going crazy trying to figure out how to do it. And the 'manual' does not mention it at all.

  • Laura Robinson
    Laura Robinson Feb 22, 2012

    I have the SPL-P100 ( purchased from Staples) and simply cannot find the "tab" button...Help?

  • Laura Robinson
    Laura Robinson Feb 22, 2012

    OMG OMG...PLEASE Disregard my above statement/question ( I feel so stupid )


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How to stop it from rounding up or down

Did you try it on the "F" position?

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2x plus 5y equals 7 3x plus 6y equals 3

1) 2x + 5y = 7
2) 3x + 6y = 3

I'm going to use the method of elimination to solve for x and y.
Multiply 1) by 3 and 2) by 2 to allow the x's to be eliminated.

1) 6x + 15y = 21
2) 6x + 12y = 6

Now subtract line 2 from line 1.

0x + 3y = 15
---- ----
3 3 divide both sides by 3 to get y by itself.
y =5.
Substitute into 1) to calculate x.
2x + 5(5) = 7
2x + 25 = 7
2x + 25 -25 = 7 - 25
2x = -18
---- ----- divide both sides by 2 to get x by itself
2 2

x = -9

Check by plugging in answer into the other equation, in this case 2)

3 (-9) + 6(5) = 3
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We did it correctly and checked to prove that we did it right.

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Mar 12, 2015 | Office Equipment & Supplies

1 Answer

How to calculate decimal to octal

step 1: divide decimal number by 8
step 2: write down the residual of division
step 3: if the result of division if 7 or less, write it to the left of residual you wrote in step 2, and there you go, you;ve got an octal represent. If the result is greater or equal to 8 then:
step 4: divide that result by 8
step 5: write the residual of that division to the left of the last one you wrote
step 6: from tis point everything is the same as from step 3.

Example: calculate octal represent of 123

123 / 8=15 , and residual is 3
15 >= 8, so the next thing you do is:
15 / 8 =1, and residual is 7
so far, we have 73
1<=7, so you write it to the left of 7, and there you go, 173 is octal represent of 123.

Hope this was helpful.
if you want to check your calculations, most calculator software has option to automatically calculate octal represents, i.e.

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1 Answer

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I do not have access to a manual but from pictures I saw, I believe it is the key marked 4/5 that sets the round off.

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2 Answers

When I type 12!/5!7! I'm getting 2.01180672e10. My answer is suppose to be 792. Please help.

Somehow you're calculating 12!/(5!/7!).

Press 1 2 MATH left-arrow 4 / 5 MATH left-arrow 4 / 7 MATH left-arrow 4 ENTER to calculate the desired value. Alternatively, you can press 1 2 MATH left-arrow 3 5 ENTER or 1 2 MATH left-arrow 3 7 ENTER to calculate the same thing.

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1 Answer

I need the EXACT solution for -7 + square root of 61 divided by 2. I have a Ti-30XA calculator and I don't know how to do this.

It is unclear whether your equation is:

a: ((SQRT61) - 7) / 2
b: ((SQRT61) / 2) - 7

For a:
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Divide by 2.
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For b:
Type 61 then SQRT.
Then divide by 2.
Then subtract 7.
Equals. (Should be -3.094875...)

Good luck.

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"Fix" indicates the calculator is rounding results. Press "Fix" followed by "." (decimal point) to remove the fixed decimal setting.

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