Consider this scenario.
A jewelry maker designed 27 necklaces and 41 bracelets for a craft show.
Let's estimate the number of pieces of jewelry which she made for the show.
For this, we estimate the number of necklaces and bracelets to the nearest tens and then add.
Estimation of number of necklaces made: 30 (27 rounds up to 30)
Estimation of number of bracelets made: 40 (41 rounds down to 40)
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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.