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Master Radical Numbers

Radical numbers are presented in math with, what is commonly referred to as the "square root sign".

It is also VERY important to note, that at the grade school level of math and radicals, in general the highest root a student will be expected to perform on is the square root (like the examples I have given here. But a radical can be presented with a number to the left of the symbol along with the number within the symbol. The number to the left, dictates the amount of times the root must be multiplied BY ITSELF resulting in the number within the symbol. So with the image to the left, the question is: What number when multiplied by ITSELF X times will result in Y?

If there is NO number to the left of the symbol - it is understood to be '2' (the square root).

During our exploration of exponents we discovered that the notation simplifying

is a short hand representation of saying X multiplied by X. With Radical numbers we are exploring a new concept. When we write

we are asking - "What two numbers when multiplied together will result in X?"

Example

An example of this is

. What number, when multiplied by itself results in 4? The answer is 2.

Why? Because 2 x 2 = 4

It is important to note here that the root of a number can be both rational numbers or irrational numbers.

Once your child fully understands what a radical number is, it will be time for them to move on to working with them. Bellow I list what your child will be expected to do with these numbers, along with the links to get to the relevant information.

Rationalizing the Denominator

If you enjoyed the information presented here on the topic ofradical numbers, please feel free to explore all the other great information I offer. You may just find the Algebra Help you are looking for!

Don't forget that you can explore all the other areas of basic mathematics by exploring this site from printable-math-worksheets Home page.

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