How to add mixed fractions - Casio FX-300MS Calculator

An improper fraction is simply a fraction with the numerator being larger than the denominator.

To make it an improper fraction from the mixed number given, just multiply the whole number (2) by the denominator (3), then add the numerator (2). The result is the new numerator and the denominator remains the same.

In this case (2 2/3), it would be 2 * 3 + 2 for the numerator....or 8. So 8/3 would be the improper fraction.

Multiplying Fractions:

1. Make sure you're working with two fractions.
2. Multiply numerator x numerator, then multiply denominator x denominator.

Dividing Fractions:

1. Make sure you're working with two fractions
2. Flip the second fraction upside down.
3. Change the division sign into a multiplication sign.
4. Multiply top x top and bottom x bottom.

Converting Mixed Numbers into Improper Fractions:

1. Convert mixed numbers into improper fractions.
2. Take the whole (non-fraction) number and multiply it by the denominator.
3. Add that answer to the numerator.
4. Put that amount over the original denominator and you will have an improper fraction.

Method for Adding and Subtracting Fractions:

1. Find the lowest common denominator (bottom number). For both adding and subtracting fractions, you'll start with the same process.
2. Multiply fractions to match the lowest common denominator.
3. Add or subtract the two numerators (top number) but NOT the denominators.

Press SHIFT [SETUP] 1 to switch to the MthIO mode if you haven't already done so. Use the stacked-boxes key just below the CALC key to enter fractions. For example, to enter 2/3, press stacked-boxes 2 cursor-right 3. For mixed fractions use SHIFT stacked-boxes. For example, to enter 1 1/2 press SHIFT stacked-boxes 1 cursor-right 1 cursor-right 2 cursor-right.

As a full example, to add 1/2 and 1/3, press stacked-boxes 1 cursor-right 2 cursor-right + stacked-boxes 1 cursor-right 3 cursor-right =

(The final cursor-right just before = is optional.)

Multiply the integer portion by the denominator of the fraction, add the numerator of the fraction, and put the result over the denominator.

If you're asking how to do this automatically on some calculator, what make and model?

Multiply the integer portion by the denominator of the fraction, add the numerator of the fraction, and put the result over the denominator.

If you're asking how to do this automatically on some calculator, what make and model?

If the result is positive, type in the integer part then add the fraction part either with the help of the fraction key or the division key. (I do not think that the TI82 has a fraction key.
If it is anything like the TI3 there is command under MATH >Frac. It should be pressed after you enter the mixed number to keep the result as a fraction.
If the mixed number is negative you enclose the whole number in parentheses. Press the change sign (-) key to negate the result.

You cannot, you must enter 3.75. If you can't figure out what the fraction is, you must first compute the fraction (3/4=.75) and then add it to the whole number (3+.75=3.75)

Upgrade the OS of the calculator to the 2.53 MP (Math Print) version. As you can see on the following screen capture of the MODE setting, you can choose to use the CLASSIC option (the old way) or the MathPrint version.
You should notice that the Answers AUTO DEC or FRAC options allow you to configure the calculator to work in DECimal, FRACtions or AUTO (the calculator chooses whats is appropriate).
The n/d is for improper fractions and Un/d for mixed fractions.

Enjoy your new found freedom.



Here is the link to the new OS 2.53MP

When you get a fraction for he answer: shift-S<->D[a b/c<->d/c]

This way, you change it to a mixed fraction or improper fraction

type the whole number then hit the ABC button then type the numerator then hit ABC then type the denominator


1ABC1ABC2 + 1ABC1ABC2=3