A learner understands that the principal square root of a nonnegative integer lies between consecutive integers whose squares bound the number: if , then . This distinguishes perfect-square roots from irrational roots and supports locating roots on a number line; this scope does not include methods for high-precision decimal approximations or roots of more general expressions.
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To estimate between consecutive integers:
Find the consecutive perfect squares around :
and
Since
we can take the square root of each part:
Therefore,
So, is between and . It is not a whole number because is not a perfect square. On a number line, place somewhere between and .
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