Question about Sharp EL-1801P Calculator

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I have a "dot" showing up after my zero, and no, it's not a decimal point. I can't make it go away. then when i try to multiply it totals the number and adds a + sign after the total mark. how do I get rid of this!!???

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Hi - I think you have the "Grand Total" switch set. For normal operation set the switch to the central position as below:

A DOT AFTER THE ZERO - 55a2965.jpg
Hi - You can download the manual from the link underlined in blue below:


Please update the question & let us know if the information given was useful to you - Good Luck!

Posted on Jul 16, 2008


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If a decimal # has a value less than 1 do you put a zero to the left of the decimal point?

There is no rule requiring a zero to the left of the decimal point, but it's generally considered good style.

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Do i have to loosen set screws on turrets to zero scope or do i zero and leave the set screws where they are to shoot at different distances? thx. 6x24x42 varmint with mil dot reticle.

Sight in your scope, Loosen the set screws and zero the dials the re-set the set screws. This will make it easy for you to adjust for distance and wind from the zero setting when in the field shooting. Then you can go back to your zero.

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I can't set total time and total odo on my Sigma BC 906. Because of place of dot. How to change the place of dot ?

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What type of brake fluid goes in a 2000 chevrolet silverado

The filler cap and manual both specify DOT 3--"Delco Supreme 11" or equivalent.
Lets look at what the DOT ratings mean. The table below shows the MINIMUM wet and dry boiling points for DOT 2, 3, 4, and 5 brake fluid in degrees fahrenheit.
Dry Boiling point 374 401 446 500
Wet boiling point 284 311 356

The DOT 2 spec is for drum brakes and is obsolete. If you have any DOT 2 in your garage, throw it away!
DOT 5 is for silicone brake fluid. Silicone brake fluid (DOT 5) should be avoided because it is not compatible with regular brake fluid, it is hard to pour without introducing bubbles and thus results in soft pedal feel, and moisture still gets into your system and will pool in low areas like your calipers and encourage rapid corrosion. STAY AWAY!
That leaves DOT 3 and DOT 4 fluids. These fluids are compatible with each other and may be interchanged or mixed with no ill effects.
I haven't had any problems at that time adding Prestone DOT 4 to the original GM fluid.
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1 Answer

I need help with significant figures 3.414s 10.02s 58.325s 0.00098s

There are 4 sig figs (sfs) in 3.414.
  • 4 sfs in 10.02
  • 5 sfs in 58.325
  • 2 sfs in 0.00098

The rule I use is the "dot right-moving arrow" rule.
I know it seems weird, but it is a very powerful rule, always reliable!

Here is what you do:
If the number has a dot in it (that is, if it has a decimal in it), imagine an arrow swooshing from left to right through the number. Start counting sig figs as soon as the imaginary arrow strikes a non-zero digit. Every digit the arrow goes through after it hits that first non-zero digit, is a significant digit (sig fig). The total number of sig figs is the sum of the first non-zero digit + all the following digits the arrow goes through after that. Very simple, right?

As an example, in 0.00098, the arrow sweeps through the leading zeros without counting until it stikes the first nonzero digit, 9. (BONK!!) So you must count it and the following digit (8). So the total number of sfs is only 2 for this number. Try it on the other numbers for practice.

For a better closure, I guess I should explain the other related rule for sig figs:
The "no-dot left arrow" rule. You can use this rule when a number does not have a decimal in it. For example, the number 500 s. (I am using the same unit you gave in your quantities. As you can see, no decimal is shown. So you can not be sure the number has 3 sfs or not. It would only have 3 sig figs if you were informed it was an exact number. An exact number is a number which has been obtained by counting every object it represents. As in a classroom filled with 200 students, each one counted by their teacher during roll call.

To apply the no-dot left-moving arrow rule, simply imagine an arrow moving left until it hits the first non-zero digit. In this case, that digit is the 5, which is only one digit. Therefore, there is only 1 sig fig in 500 s.

Suggestion: Google up "sig figs" and get some more examples of quantities to practice counting sig figs. Also pay attention to the important related topic of proper rounding off of calculated quantities which have different numbers of sig figs. You will find this skill invaluable when you take a lab based chemistry or physics course!

Good luck!


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1 Answer

Convert 4 2/9 to a decimal

Step 1: Find a number you can multiply by the bottom of the fraction to make it 10, or 100, or 1000, or any 1 followed by 0s. Step 2: Multiply both top and bottom by that number. Step 3. Then write down just the top number, putting the decimal place in the correct spot (one space from the right for every zero in the bottom number) Example 1: Express 3/4 as a Decimal Step 1: We can mulitply 4 by 25 to become 100
Step 2: Multiply top and bottom by 25:
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4 100 left-under-over-arrow.gif ×25 Step 3: Write down 75 with the decimal place 2 spaces from the right (because 100 has 2 zeros);
Answer = 0.75

Example 2: Express 3/16 as a Decimal Step 1: We have to mulitply 16 by 625 to become 10,000
Step 2: Multiply top and bottom by 625:
×625 left-up-over-arrow.gif 3 = 1,875

16 10,000 left-under-over-arrow.gif ×625 Step 3: Write down 1875 with the decimal place 4 spaces from the right (because 10,000 has 4 zeros);
Answer = 0.1875

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Step 2: Multiply top and bottom by 333:
×333 left-up-over-arrow.gif 1 = 333

3 999 left-under-over-arrow.gif ×333 Step 3: Now, 999 is nearly 1,000, so let us write down 333 with the decimal place 3 spaces from the right (because 1,000 has 3 zeros):
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