Square Root of Small Integers

Having decimal approximations of the square roots of small integers memorized is beneficial for estimation problems.

• $\sqrt{2} \approx 1.414$
• $\sqrt{3} \approx 1.732$
• $\sqrt{5} \approx 2.236$
• $\sqrt{6} \approx 2.449$
• $\sqrt{7} \approx 2.645$
• $\sqrt{8} \approx 2.828$