Understanding Radicals

The video tutorial explains the concept of radicals in mathematics, detailing the parts of a radical symbol, including the radicand and index. It describes how radicals are the inverse of powers, similar to how addition and subtraction are inverses. The tutorial provides examples to illustrate how to work backwards using radicals, such as finding the cube root of 27 or the square root of 16, emphasizing the importance of understanding the role of the index in these calculations.

What is the term for the number inside the radical symbol?

• Exponent

• Radicand

• Base

• Index

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CCSS.8.NS.A.1

What is the small number above the radical symbol called?

• Exponent

• Base

• Radicand

• Index

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CCSS.2.NBT.B.5

How are addition and subtraction related in terms of mathematical operations?

• They are inverses

• They are unrelated

• They are the same

• They are both multiplication

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CCSS.6.EE.A.1

Which of the following pairs are considered inverses?

• Addition and multiplication

• Subtraction and division

• Addition and exponentiation

• Multiplication and division

If the radicand is 27 and the index is 3, what is the base number?

• 3

• 9

• 27

• 81

What is the most common radical called when there is no index?

• Fourth root

• Square root

• Fifth root

• Cube root

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CCSS.HSN.RN.B.3

What does the absence of an index in a radical symbol imply?

• The index is 2

• The index is 1

• The index is 4

• The index is 3

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CCSS.8.EE.A.2

In the example where the radicand is 16, what is the base number when using a square root?

• 2

• 4

• 16

• 8

If the radicand is 98 and the index is 5, what is the base number?

• 3

• 2

• 5

• 4

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CCSS.HSN.RN.A.2

What is the primary purpose of using radicals in mathematics?

• To undo a power

• To multiply numbers

• To add numbers

• To divide numbers

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CCSS.HSN.RN.A.2