Approximating Square Roots

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What is a square root?

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A square root of a number is a value that, when multiplied by itself, gives the original number. For example, the square root of 9 is 3, because 3 x 3 = 9.

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CCSS.8.EE.A.2

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What is the symbol for square root?

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What is the square root of 16?

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The square root of 16 is 4, because 4 x 4 = 16.

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CCSS.8.EE.A.2

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How do you approximate the square root of a number?

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CCSS.8.NS.A.2

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CCSS.8.NS.A.2

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What are perfect squares?

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Perfect squares are numbers that are the square of an integer. Examples include 1, 4, 9, 16, 25, etc.

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CCSS.6.EE.A.1

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What is the square root of 25?

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The square root of 25 is 5, because 5 x 5 = 25.

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CCSS.6.EE.A.1

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CCSS.8.EE.A.2

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What is the relationship between square roots and exponents?

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CCSS.HSN.RN.A.2

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How can you check if your approximation of a square root is correct?

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You can check your approximation by squaring your estimated value and seeing if it is close to the original number.

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CCSS.8.NS.A.2