Where is the battery compartment?
I just replaced mine. It IS a Casio JF-100MS. The LR44 battery listed is also a #357. Take out the 3 black screws on the back - 2 at the top and one at the bottom. The back comes straight off up from the body if you are looking at the back - (keys pointing down).
You need a tiny flat blade screwdriver to get it into the groove between the back & body. Its easier to insert about 1/4 of the way down from the top between the top of the keys and the display where the grey color of the back wraps around the front in a small grey band below the display.
Slowly work the screwdriver around the back perimeter to get it to release from the body. Once off you will see the back of the circuit board and the small chrome cradle cover around the battery. You push the battery out towards the outside which is mostly open except for a very small tab. Mine was very corroded.
After pushing the battery out I cleaned the cage cover and the circuit board where the battery touches it until shiny. Insert new battery - lettering up not down on circuit board - making sure contact with board and cage is OK. Set cover over circuit board into body, carefully squeeze along the sides of the cover to pop-it in tight to the body all around. Then replace the 3 small screws you originally took out carefully..
I couldn't find the manual for your JF-100MS but I have a Casio FX series calculator that, like yours, is solar + battery backup. On the back of the calculator there should be a small door or coverplate with a tiny screw. If you remove the screw the cover should come off and you can then access the button cell battery for replacement.
SOURCE: CHANGE TAX %+ & TAX- ON MY CASIO JF-100TE CALCULATOR
1. Press [AC]
2. Hold [SET/%] key for about 2 seconds
3. Press [TAX+]
4. Input the tax rate
5. Press [SET/%]
SOURCE: i have scientific calculator fx-100ms & i dont
Hello,
What happened to the manual that came bundled with the calculator?
The following link will take ypu to the casio web site where you can download the manual you need.
http://support.casio.com/pdf/004/fx115MS_991MS_E.pdf
Hope it helps
SOURCE: how do I calculate the
It seemed there is no Modulo function in fx-100MS. But Mod is just the remainder of a division operator.
So if you have A mod B = C, divide A by B, subract the remaining whole number, and multiply it by B to get C.
Example:
7 mod 4 = 3
In the Calculator:
7 / 4 = 1.75, then 1.75 - 1 = 0.75. Then 0.75 x 4 = 3
SOURCE: how to calculate 3^97 mod
The trick with this type of question is to remain within the capacity of the calculator you are using. 3^97 gives an answer that is well over the capacity of most calculators so we need to break the calculation down into smaller chunks that remain within the calculator's capacity.
One way to do this is to calculate (3^20)mod353 and then multiply the answer by itself four times, which takes us to (3^80)mod353. Then calculate (3^17)mod353 and multiply it with the previous answer, taking us to the required (3^97)mod353 = 40. You can check this with the standard Windows scientific calculator.
The reason this works is that we are removing as many multiples of 353 as possible at each stage of the calculation, rather than removing all the 353's right at the end. It also requires us to know that power numbers can be added together.
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