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CAHSEE Math 5.5 Number Sense 206 Views


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Description:

Number Sense: Drill Set 5, Problem 5. Between which two integers does the square root of 80 lie?

Language:
English Language

Transcript

00:03

Here's your shmoop du jour...

00:06

Between which two integers does the square root of 80 lie?

00:10

Okay here are the potential answers...

00:13

Before we spoil the ending and kill all the drama... why not hit pause and try to resolve it yourself first?

00:21

So... this is kind of a forcibly brute-forced problem.

00:25

In other words, there isn't some magic formula we can use to solve this puppy.

00:29

What we do know is that there are perfect squares in and around 80 that'll make life easier.

00:35

That is... we know that 8 squared is 64 and that 9 squared is 81.

00:40

HOW do we know that?

00:41

Well, all those years we spent working on our multiplication tables are really paying off now.

00:47

And that's... it.

00:48

Just glance the answers, and select choice B. Done.

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