I’m going to explain how to find the square root of 79.

First you do, 8*8 which equals 64.Then 9*9 which equals 81.

Second you do, you write a number line down and find the half way point.. Then you add 64+8.5=72.5

Last you see if 79 is closer to 72.5 or 81. Its closer to 81 and the answer is 8.9.