To simplify the square root of 80, you would take the largest square that goes into 80 evenly and take it out from 80. The largest square that goes into 80 is 16, so you would take out divide 80 by 16, getting 5, then take out the 16. You would then find the square root of 16, 4, and use that as the whole number. The answer would be 4 square root of 5.
