Skill: Estimate square roots between consecutive integers

Explanation and Free Practice Resources

A learner understands that the principal square root of a nonnegative integer lies between consecutive integers whose squares bound the number: if n2<m<(n+1)2n^2 < m < (n+1)^2, then n<m<n+1n<\sqrt m<n+1. 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.

Detailed Explanation: Estimate square roots between consecutive integers

To estimate m\sqrt{m} between consecutive integers:

  1. Find a perfect square less than mm.
  2. Find the next perfect square greater than mm.
  3. Use their square roots as the bounds.

Example: Estimate 50\sqrt{50}

Find the consecutive perfect squares around 5050:

72=497^2=49

and

82=648^2=64

Since

49<50<64,49<50<64,

we can take the square root of each part:

49<50<64.\sqrt{49}<\sqrt{50}<\sqrt{64}.

Therefore,

7<50<8.\boxed{7<\sqrt{50}<8}.

So, 50\sqrt{50} is between 77 and 88. It is not a whole number because 5050 is not a perfect square. On a number line, place 50\sqrt{50} somewhere between 77 and 88.

Learn by doing: Estimate square roots between consecutive integers

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Number Types (Irrational) - Between X and Y - Positive Square Roots


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