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Why Does My Casio Calculator Give Answers in Fractions OR

# Why Does My Casio Calculator Give Answers in Fractions

You are using the scientific mode. This mode is useful for making trigonometry table and many other calculations. Here are some hints for using the scientific mode. Use the trigonometry table for fractions for angles, angles for angles, triangles, and more.

### Press

When you press the s<=>d button does it do anything at all? Or does it swtich between 39/12500 and 3.12x10^-3, because 3.12x10^-3 is hardly difficult.. move the numbers 3 places to the right... And there's nothing wrong with leaving it in standard form. I believe theyd accept something like 0.0000000069 if you wrote it as 6.9x10^-9 which is what the calculator would give you... And they would probably prefer it in standard form too.

When describing how to use various calculator functions, this guide gives the exact keys that you need to press using the symbols shown on the keys. This is known as a ‘key sequence’. If the key sequence accesses the second function of a key, or a function from a menu, the name of this function will be given in brackets at the appropriate point in the key sequence. Names in brackets are thus not keys that you press but simply describe the function that is accessed using the previous key sequence. For example, to turn off the calculator, press.Sometimes when entering into your calculator an expression involving roots, you may accidentally forget to press the appropriate function key. However, moving the cursor to the correct point and pressing the missing key, as in section 1, will not work as this simply inserts an empty template. (Source: www.open.edu)

#### Want

You can't convert a decimal to a fraction on the calculator, but the calculator can help you do it with a pencil and paper. Suppose you want to express 0.7143 as a fraction. You could write it as 7143/10,000, but maybe you want to reduce this to something a lot more simple, such as a denominator that's a single digit. To do this, enter the original number as decimal, and then multiply by the desired denominator. This gives you the numerator of the fraction. For example, if you want a fraction with 7 in the denominator, multiply 0.7143 by 7. The calculator will display the numerator, which in this case is 5.0001, which is close enough to 5 to be equal. You can then write the fraction 5/7 on a piece of paper.

A variation on the above method is to break the calculation into two parts, and use the memory functions of the calculator to store the result of the first part. The calculator memory is particularly useful when you want to calculate the values of several expressions that have a common part. This common part need be entered only once and its value reused several times subsequently. For example, rewriting the formula for the volume of wood contained in a log as (Source: www.open.edu)

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