4.2.3 Square Root of Small Integers
The following square roots are good to have memorized to at least the truncated thousandths place:
Key Values
| √n | Approximate Value |
|---|---|
| √2 | 1.414… |
| √3 | 1.732… |
| √5 | 2.236… |
| √6 | 2.449… |
| √7 | 2.645… |
| √8 | 2.828… |
These are useful for approximation questions as well as calculations involving these values.
Problem Set 4.2.3
Practice these problems. Type your answer and press Enter to check:
Round 2√3 to nearest tenth
Greatest integer < 12√2
Truncate √2+√3+√5 to 1 decimal
[√7 − √3]
[√6 + √7]
[2√3 − π]
Round 5√2 + 4√3 to nearest whole
Round √5 + 6√7 to nearest whole