No calculators! Assure your learners that they can find the square root of a large number. All they need are two known squares close by and a table. Come up with an additional practice and your number crunchers will have it mastered in no time.

Concepts

rational numbers, square roots, radicals

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Additional Tags

square root, rational number, decimal expansion, math

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Pros

• Good estimation lesson using known squares

Cons

• Need to supply additional practice

Common Core

8.NS.A.1 8.NS.A.2