To multiply a number by 10 you can simply shift it to the left by one digit, and fill in the rightmost digit with a 0 (moving the decimal place one to the right). ...
To see how many digits a number needs, you can simply take the logarithm (base 10) of the absolute value of the number, and add 1 to it.
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Answer:
To multiply a number by 10 you can simply shift it to the left by one digit, and fill in the rightmost digit with a 0 (moving the decimal place one to the right). ...
To see how many digits a number needs, you can simply take the logarithm (base 10) of the absolute value of the number, and add 1 to it.
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