Question about Casio FX-115ES Scientific Calculator

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Maybe you should hit the equal sign not the answer button to give you an answer. If this model have both ans and = button, the answer button records the last computation perform, say 2+2 = 4 then the 4 stored in ans button. When you hit ans+2 it will give you 6.

Just a thought.

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

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First make 1 2/3 into a mixed fraction and then divide it by 3.

To make 1 2/3 into a mixed fraction, multiply the whole number, in this case, 1, by the denominator (the bottom number) and then add the numerator (the top number). Thus, we get (1*3+2)/3 or 5/3. Now we have to take 5/3 and divide it by 3. I was taught that in this case, dividing by 3 is the same as multiplying by 1/3. 5/3 x 1/3 = 5/9.

If you have access to a calculator you can always check this. On the calculator, do 2 divided by 3 and add 1. Now take that answer and divide by 3. Write down this answer. Now take 5 and divide by 9. Write down this answer. They should be the same.

Good luck.

Paul

To make 1 2/3 into a mixed fraction, multiply the whole number, in this case, 1, by the denominator (the bottom number) and then add the numerator (the top number). Thus, we get (1*3+2)/3 or 5/3. Now we have to take 5/3 and divide it by 3. I was taught that in this case, dividing by 3 is the same as multiplying by 1/3. 5/3 x 1/3 = 5/9.

If you have access to a calculator you can always check this. On the calculator, do 2 divided by 3 and add 1. Now take that answer and divide by 3. Write down this answer. Now take 5 and divide by 9. Write down this answer. They should be the same.

Good luck.

Paul

Mar 17, 2015 | Office Equipment & Supplies

It is the inverse button and converts to 1(one) divided by the number you input, the inverse of the number. For instance if you press 2 (two) then press 1/x it gives the answer 0.5. That is because 1 divided by 2 is a half. Try it with numbers you know the answer to to check and then trust the answer it gives to numbers you don't know

Aug 23, 2014 | Casio Office Equipment & Supplies

MOD simply calculates the remainder that is left over after dividing by the MOD parameter.

For example, 10MOD7 = 3 since you can only divide 7 into 10 once, leaving a remainder of 3.

For larger numbers, eg 389487MOD31 you start by dividing 389487 by 31, which gives 12564.09677 (on the display), however you only want the fractional part so subtract 12564 to give 0.0967741935 . This includes the lower value digits that were previously hidden. Then multiply this result by 31 which gives 2.999999999 on the display. Since the result of a MOD calculation has to be a whole number, the answer needs to be rounded to 3. If the answer doesn't easily round to a whole number, it is likely that you have gone beyond the calculators working capacity.

An alternative method is to take the integer part of the first result (12564) and multiply it by 31 to get 389484, then subtract this from 389487, giving the answer of 3.

For example, 10MOD7 = 3 since you can only divide 7 into 10 once, leaving a remainder of 3.

For larger numbers, eg 389487MOD31 you start by dividing 389487 by 31, which gives 12564.09677 (on the display), however you only want the fractional part so subtract 12564 to give 0.0967741935 . This includes the lower value digits that were previously hidden. Then multiply this result by 31 which gives 2.999999999 on the display. Since the result of a MOD calculation has to be a whole number, the answer needs to be rounded to 3. If the answer doesn't easily round to a whole number, it is likely that you have gone beyond the calculators working capacity.

An alternative method is to take the integer part of the first result (12564) and multiply it by 31 to get 389484, then subtract this from 389487, giving the answer of 3.

Feb 23, 2013 | Casio FX991ES Scientific Calculator

Finding the remainder from a division calculation is often referred to as using the MOD function, though this isn't available directly on the fx-991ES.

To obtain the remainder, for example when dividing 10 by 7, you can only divide 7 into 10 once, leaving a remainder of 3.

For larger numbers, eg when dividing 389487 by 31 (equivalent to 389487MOD31) the division gives an answer of 12564.09677 (on the display), however you only want the fractional part so subtract 12564 to give 0.0967741935 . This includes the lower value digits that were previously hidden. Then multiply this result by 31 which gives 2.999999999 on the display. Since the result of a MOD or remainder calculation involving integers has to be a whole number, the answer needs to be rounded to 3. If the answer doesn't easily round to a whole number, it is likely that you have gone beyond the calculator's working capacity.

An alternative method which avoids the rounding of the fractional part is to take the integer part of the first result (12564) and multiply it by 31 to get 389484, then subtract this from 389487, giving the answer of 3.

To obtain the remainder, for example when dividing 10 by 7, you can only divide 7 into 10 once, leaving a remainder of 3.

For larger numbers, eg when dividing 389487 by 31 (equivalent to 389487MOD31) the division gives an answer of 12564.09677 (on the display), however you only want the fractional part so subtract 12564 to give 0.0967741935 . This includes the lower value digits that were previously hidden. Then multiply this result by 31 which gives 2.999999999 on the display. Since the result of a MOD or remainder calculation involving integers has to be a whole number, the answer needs to be rounded to 3. If the answer doesn't easily round to a whole number, it is likely that you have gone beyond the calculator's working capacity.

An alternative method which avoids the rounding of the fractional part is to take the integer part of the first result (12564) and multiply it by 31 to get 389484, then subtract this from 389487, giving the answer of 3.

Dec 16, 2012 | Casio FX991ES Scientific Calculator

Press MODE to bring up the mode screen. Press F3 to bring up the CAS screen. Use the cursor keys to move to the Numeric field. Press F3 if necessary to check it. Move to the Approx field and check this also if necessary. Press ENTER twice to save the changes.

Nov 03, 2011 | HP 50g Graphic Calculator

I'm not sure if this is 8th 9th grade level answer, but it is the easiest explanation .

if you have a number x to the power of n divided by the number x to the power of m then that is equal x to the power of (n-m).

x^n/x^m = x^(n-m)

therefore

x^n/x^n= x^(n-n)= x^0 = 1

because every number divided by itself equals 1

if you have a number x to the power of n divided by the number x to the power of m then that is equal x to the power of (n-m).

x^n/x^m = x^(n-m)

therefore

x^n/x^n= x^(n-n)= x^0 = 1

because every number divided by itself equals 1

Jul 17, 2010 | Microsoft Windows XP Professional for PC

The reason is related to the associated multiplication question. If you
divide 6 by 3 the answer is 2 because 2 times 3 IS 6. If you divide 6 by
zero, then you are asking the question, "What number times zero gives 6?"
The answer to that one, of course, is no number, for we know that zero
times any real number is zero not 6. So we say that division by zero is
undefined, for it is not consistent with division by other numbers.

You can try to make up a good set of rules, but it always leads to nonsense, so to avoid all the trouble we just say that it doesn't make sense to divide by zero.

What happens if you add apples to oranges? It just doesn't make sense, so the easiest thing is just to say that it doesn't make sense, or, as a mathematician would say, "it is undefined."

Maybe that's the best way to look at it. When, in mathematics, you see a statement like "operation XYZ is undefined", you should translate it in your head to "operation XYZ doesn't make sense."

Other details can find in Why can't we divide by zero?

Hope help with this (remember rated this).

You can try to make up a good set of rules, but it always leads to nonsense, so to avoid all the trouble we just say that it doesn't make sense to divide by zero.

What happens if you add apples to oranges? It just doesn't make sense, so the easiest thing is just to say that it doesn't make sense, or, as a mathematician would say, "it is undefined."

Maybe that's the best way to look at it. When, in mathematics, you see a statement like "operation XYZ is undefined", you should translate it in your head to "operation XYZ doesn't make sense."

Other details can find in Why can't we divide by zero?

Hope help with this (remember rated this).

Feb 06, 2010 | 1988 Lincoln Mark VII

Hi,

You are not dividing problems, you are dividing number. This said, there is a simple way to ensure that the results of divisions are displayed in decimal form: It consists in putting a decimal mark (decimal point) at the end one integer (whole number)

ex:

3/2. gives 1.5

3./2 gives 1.5

3./2. gives 1.5

You can also configure your calculator to display all numerical results in decimal format. To do that press [MODE][F2]. Use the down arrow to select the ligne**Exact/Approx**, then use the right arrow to unfold the menu options 1:Auto

2:Exact

3:Approximate

Select 3:Approximate and press [ENTER]

Hope it helps.

You are not dividing problems, you are dividing number. This said, there is a simple way to ensure that the results of divisions are displayed in decimal form: It consists in putting a decimal mark (decimal point) at the end one integer (whole number)

ex:

3/2. gives 1.5

3./2 gives 1.5

3./2. gives 1.5

You can also configure your calculator to display all numerical results in decimal format. To do that press [MODE][F2]. Use the down arrow to select the ligne

2:Exact

3:Approximate

Select 3:Approximate and press [ENTER]

Hope it helps.

Nov 15, 2009 | Texas Instruments TI-89 Calculator

Hello,

To convert from fractions to decimals, and from decimals to fractions use the [S<-->D] key. If you want your decimal results to have a fixed number of decimal places press [SHIFT][SETUP][6:Fix]. Screen shows Fix 0~9. Enter the number of decimal places exemple 3.

Dans ce cas 1/6 is displayes ase 0.167.

Hope it helps.

To convert from fractions to decimals, and from decimals to fractions use the [S<-->D] key. If you want your decimal results to have a fixed number of decimal places press [SHIFT][SETUP][6:Fix]. Screen shows Fix 0~9. Enter the number of decimal places exemple 3.

Dans ce cas 1/6 is displayes ase 0.167.

Hope it helps.

Sep 23, 2009 | Casio FX-115ES Scientific Calculator

Proper fraction e.g. 3/5, input 3, divide, 5, =, answer 0.6

Improper fraction, either enter as improper fraction, or enter the whole number first, then +, then the proper fraction as before, then =.

E.g. 8/5 which is "1 and 3/5': enter 1, +, 3, "divide", 5 =, answer is 1.6

Or, just 8, "divide", 5, same 1.6 answer. Why go to mixed number first?

13/5 which is "2 and 3/5", enter 2, +, 3, "divide", 5, =, answer is 2.6. Or, just 13/5, same answer

Improper fraction, either enter as improper fraction, or enter the whole number first, then +, then the proper fraction as before, then =.

E.g. 8/5 which is "1 and 3/5': enter 1, +, 3, "divide", 5 =, answer is 1.6

Or, just 8, "divide", 5, same 1.6 answer. Why go to mixed number first?

13/5 which is "2 and 3/5", enter 2, +, 3, "divide", 5, =, answer is 2.6. Or, just 13/5, same answer

Dec 17, 2008 | Texas Instruments TI-30XA Calculator

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