Square Root of 18

The number 18 is an even number with six factors, such as 1, 2, 3, 6, 9, and 18. The square root of 18 is expressed as √18. This √18 is known as a radical form. And the √18 = 4.242. Once the children have learned the numbers up to 20, parents can teach them 18 Times Table. Multiplication tables play an important role in teaching √18 and its properties. Little learners find it easy when simple math games and activities are a part of their learning process. Also, these activities refresh the little minds and motivate them to learn more. Needless to say, learning square root will help them to calculate the problems easily.

What is the Square Root of 18?

The √18 is derived when a numeric is multiplied by the same numeric. However, a few kids might have this question, if the square root of 18 is a perfect square. The number 18 is not a perfect square as the square root of 18 is not a whole number. Besides this, the √18 up to 5 decimal places = 4.24264. Moreover, √18 is expressed in the following ways mentioned below. In addition, parents and teachers can help little ones to learn the Multiplication Table for Kids, available at Osmo.

• Decimal form: 4.242
• Radical form: √18

How to Find the Square Root of 18?

The √18 can be simplified and written down in the smaller radical form. This method is called, ‘to simplify a surd’. Now let us learn how to simplify the square root of 18.

√18 = 3√2

When the kids have learned how to simplify the square root of 18, teach them how it can be calculated by the long division method. Here is how the √18 is computed.

• Pair 2 numbers beginning from right to left and arrange one part of 00, as the decimal is required.
• Now, begin with the first pair of numbers; the biggest perfect square which is less than or equal to the number 18 is 16. The √16 = 4. The number 4 is a perfect square and place 4 on the above and 16 below.
• Then, compute 18 – 16 = 2 and write down the difference below. Now, start calculating the next pair of digits.
• 4 x 2 = 8; this is calculated by doubling the number 4. Therefore, the square root of 18 is 4.2.

Is the Square Root of 18 Rational or Irrational?

If the number 18 is a perfect square, then the square root of 18 is a rational number. As mentioned above, the square root of 18 is not a perfect square and it is a non terminating number. Thus, the √18 is not a rational number and it is an irrational number. Also, the decimals don’t terminate and this cannot be expressed as a fraction like p/q.

Osmo has a lot of Math Activities, One Minute Games for Kids, STEM Activities for Kids and many other activities. These activities make the kids learning a smooth and easy way to learn and comprehend math-related concepts.