Square Roots

**By Soo Jin Lee and Jaehong Shin**

__Day 1__

Finding the square root of a number is the inverse operation squaring that number. Remember, the square of a number is that number times itself.

The perfect squares are the squares of the whole numbers.

The square root of a number, n, written below is the number that gives n when multiplied by itself.

Many mathematical opearations have an inverse, or opposite, operatiom. Subtraction is the opposite of addition, division is the inverse of multiplication, and so on. Squaring has an inverse,too, called "finding the square root." Remember, the square of a number is that number times itself. The perfect squares are the squares of the whole numbers: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100...

Here are the square roots of all the perfect squares from 1 to 100.

since 1^2 = 1 since 2^2 = 4 since 3^2 = 9

since 4^2 = 16 since 5^2 = 25 since 6^2=36

since 7^2 = 49 since 8^2 = 64 since 9^2=81

since 10^2 = 100

next class, we will find square roots of numbers that aren't perfect squares without a calculator