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The answer depends on your calculator but many have shortcut keys for "x10x" or something similar.

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There is usually a key labelled 10x or *10x or Ex where the last letter is in superscript. Enter the mantissa of the number, then press this key followed by the exponent.

Q: How do you do scientific notation on a calculator?

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because some numbers are tooo big for the screen so the calculator puts it in scientific notation form

It is the use of scientific notation.

Try it on your scientific calculator. It will say 2.5e+4.

On most calculator there's a 'ENG' key

Some calculators have a "x10x" button.

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because some numbers are tooo big for the screen so the calculator puts it in scientific notation form

It is the use of scientific notation.

Try it on your scientific calculator. It will say 2.5e+4.

On most calculator there's a 'ENG' key

Some calculators have a "x10x" button.

use a calculator genius

Usually "10^" appears as "e".

2.5E-2 is the scientific notation. Technically it is 2.5x10-2 , E is calculator notation and would not be officially acceptable, for example, on a test.

Depending on the calculator, the button may be labeled "E", "EE", "ENG", or "EXP"

That depends on the calculator model. Typically, a calculator would switch to scientific notation when the number is less than 0.001, or greater than can be shown on screen in normal notation.

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First of all, you have to have a scientific calculator, one that supports scientific notation. (As far as I know, all scientific calculators do.) The scientific calculator should have a special key labelled something like EXP. To input (for example) 2.3 million, you would type 2.3 EXP 6 (where EXP is short for "times 10 to the power...").