Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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Deccimal Approximations of Square Roots - Problem 2

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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If we want to know the square root of 50, we want to first think of perfect squares around 50, like how 7 squared is 49 and 8 squared is 64. Since 50 is between 49 and 64 and closer to 49, the square root of 50 must be between 7 and 8 but closer to 7. Guess 7.1 and square it by hand, and see that it's too high, so now we have it narrowed down to between 7.0 and 7.1 . Next guess a value closer to 7.1 and continue the process to get an approximation to the nearest hundredth.

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