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 .
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.
Use fractions to estimate the square roots of 1-25.
How can you use perfect squared numbers to estimate square roots?
Still having trouble? No problem!I provided links and video to help you understand more!:)
SQUARE ROOTS GAME
HOW TO ESTIMATE
(I wanted to put the real video. However, it wont work and there's errors..)