###### 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

##### Thank you for watching the video.

To unlock all 5,300 videos, start your free trial.

# Deccimal Approximations of Square Roots - Problem 1

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

Share

If we want to know the square root of 30, we want to first think of perfect squares around 30, like how 5 squared is 25 and 6 squared is 36. Since 30 is between 25 and 36 and a tiny bit closer to 25, the square root of 30 must be between 5 and 6 but a tiny bit closer to 5. Guess 5.4 and square it by hand, and see that it's too low, so guess 5.5 and square it and see that it is closer, so the square root of 30 to the nearest tenth is approximately 5.5.

Transcript Coming Soon!