## Tuesday, October 26, 2010

### SQUARE ROOT

To understand today's scribe, we have to know what is a square root before anything else.
A square root is the opposite of squaring. So, instead to pressing the squared sign on the calculator, we press square root button.

HOW TO FIND A SQUARE ROOT

1) Get a calculator with square root function.

2) Since all calculators are different, try to press buttons until you get the answer. Maybe put number first, then the square root button or hit the square root button first then,the number. It all depends on how your calculator works.

3) Press the equal sign and "boom!" a bunch of numbers are on your calculators. You can round it to the hundredths though. Its easier to look at. It might not be the exact but, its close enough.

* ALL numbers have square roots. Its just that majority of them ends up with decimals.

EXAMPLE: Get the square root of 5.

1) On a calculator press √ then 5 or the opposite way.

2)Hit the equal sign button.

3)Once the answer appeared, round it to hundredths .
√3=2.23²

HOW TO ESTIMATE A SQUARE ROOT

To estimate a square root you may loo at the square root chart we made. Let's say we need to estimate what the square root 0f 570. We look at the chart and find what is closest products to 570. They are 576 and 529. Since 567 is closer, we choose that. 567's factors are 24x24, so that is an idea that the answer falls near 24.

EXAMPLE: Estimate the square root of 243.
243 falls between 225 and 256.Which is the product of 15X15(225) and 16X16(256.)Since, 256 is closer we

choose that. Now all we have to do is estimate what is the decimal needed.

ESTIMATING SQUARE ROOTS BY FRACTION

In this part, the number line we made would be helpful to us in this section.

Since there is 3 spaces between the first square root and the second square root. We would use 3 as our denominator.

1) 1/1 or 1

2)1 1/3 because, its in the first place after the perfect squared number.

3) 1 2/3 because, its in the second place after the perfect squared number.

4) 1 3/3 or 2 because, the square root of 4 is 2.

*Take note that we always don't use 3 as the denominator. It depends on how many spaces are there between a perfect squared number to another.

HOMEWORK

Use fractions to estimate the square roots of 1-25.

How can you use perfect squared numbers to estimate square roots?

SQUARE ROOTS GAME

HOW TO ESTIMATE

VIDEO:

SQUARE ROOTS

HOW TO ESTIMATE(VIDEO)

(I wanted to put the real video. However, it wont work and there's errors..)

1. Great Job Kathryn! I liked the way that you completed the scribe with all of the videos, pictures, links and whatnot,but next time, try putting the actual video instead of the link. Other than that you did a TERRIFIC JOB!

2. Good Job Kathryn! I like how your scribe is complete and neat and I like how you put the links to help us.Keep Up the Goodwork!

3. Great Job Kathryn !! I liked how the post had most of the things like pictures , and links .. Next time try and putting a video instead of just putting a link . The post was very organized and easy to follow . Keep up thr good work (:

4. FANTASTIC JOB KATHRYN! Your scribe was almost perfect but you could've put in the actual video. Everything was very organized and easy to understand. GREAT JOB BUDDY! KEEP IT UP!

5. Great Job Kathryn! Your scribe is very organized, also great job on posting pictures, links and as others said, you could have posted the actual video. Keep it up.

6. Excellent job Kathryn! Your post was organized, and i liked the way you made the key words stand out by changing the color. Next time you should embed the video so it'd make it easier for us ;) Keep up the good work!

7. Great Job Kathryn ! I like how you spent your time on it , and i really like how took pictures of the ' Estamating Square Roots ' , and ' How to estimate Square Root ' Goodjob ! Keep up the good work ;D

8. Great job Kathryn!I liked how you coloured the important and topic words and how organized it is! Keep up the good work!

9. Great job Kathryn! I liked how your scribe post was very organized & you made key words stand out. Next time, you should add in a video ;)

10. Amazing job, Kathryn! Your pictures are clear and your post is organized. No improvements needed, except try to embed the video next time. Overall, you did a great job. Keep it up!