Conversions of common metric units of weight:
Let's consider an example.
Suppose we need to compare 8 kilograms and 6,000 grams.
In order to compare, we first convert 8 kilograms to grams.
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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.