Question

On a number line, between which two consecutive whole numbers would √221 be located? Use pencil and paper. Explain why it might be useful to approximate

the value rather than use the exact value.

Answer 1

about 15

Explanation:

14^2 = 196

15^2 = 225

so √196 = 14, √225 = 15

and 221 is close to 225, so it's about 15 and the exact value would also be between 14 and 15