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Perform the following operations:

Multiply $5.7$ by $10\text{.}$

Multiply $3.1$ by $10{,}000\text{.}$
Do not use any commas in your answer.

Solution

$5.7 \times 10 = 57$
$10 = 10^1$ and multiplying by $10^1$ moved the decimal point one place to the right.

$3.1 \times 10000=31{,}000$
$10{,}000 = 10^4$ and multiplying by $10^4$ moved the decimal point four places to the right.

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