When multiplying by a power of ten, move the decimal point to the right by as many places as there are 0s in the power of 10.
For example: Let's multiply 925.653 × 100.
To find the product, move the decimal point to the right by as many places as there are 0s in the power of 10.
925.653 × 100 = ?
Notice that there are two zeros in 100.
So, move the decimal point two places to the right.
So, 925.653 × 100 = 92565.3
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.