In the base ten number system, it is extremely easy to
multiply by powers of ten.
To multiply by
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$\,10^1 = 10\,$, put
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$\,1\,$ zero at the end of the number:
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$237\cdot 10 = 2{,}370\,$
To multiply by
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$\,10^2 = 100\,$, put
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$\,2\,$ zeros at the end of the number:
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$237\cdot 100 = 23{,}700\,$
To multiply by
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$\,10^n\,$ (which is $\,1\,$ followed by $\,n\,$ zeroes),
put $\,n\,$ zeros at the end of the number.
For example,
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$\,237 \cdot 10^7 = 2{,}370{,}000{,}000\,$.
Think about why this is so easy!
When, say,
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$\,237\,$ is multiplied by $\,10\,$:
In this exercise, multiplication is denoted in two ways:
Here, you will practice multiplying by powers of ten.
Do not insert commas in your answers for this web exercise.
That is, type the answer to
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$\,631\times 10^3\,$ as $\,631000\,$, not
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$\,631{,}000\,$.