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# Introduction

In this article, you'll learn how to take the square root of perfect squares!

# Example

$\sqrt{25}=\phantom{\rule{0.167em}{0ex}}?$
Step 1: Ask, "What number squared equals $25$?"
Step 2: Notice that $5$ squared equals $25$.
${5}^{2}=5×5=25$
$\sqrt{25}=5$

### Reflection question

How can we be sure that $5$ is the right answer?

# Practice 1

${4}^{2}=$

$\sqrt{16}=$

${6}^{2}=$

$\sqrt{36}=$

${7}^{2}=$

$\sqrt{49}=$

### Reflection question

Which claim shows how square roots work?

# Practice 2

$\sqrt{1}=$

$\sqrt{4}=$

$\sqrt{9}=$

$\sqrt{16}=$

$\sqrt{25}=$

$\sqrt{36}=$

Which of the following square roots would continue the pattern?

# Practice 3

$\sqrt{100}=$

$\sqrt{64}=$

$\sqrt{81}=$

# Challenge problem

$\sqrt{40}=$

## Want to join the conversation?

• if the root was a double digit would u also multiply it self for example 14 x 14
• yes i would because it would be the same as it would by its self