how do i find the square root of a number using the standard/scientific, calculator tthe comes with windows?

Answer 1

I don't know about you but those other answers confused me!! It's simple...put in the number you want the square root of and then hit the SQRT button. On my screen that button is just below clear, right above the %, and to the right of the / key.

Hope this helps.

Answer 2

It seems there are different versions of the scientific calculator, because my XP SP2 version definately doesn't have a specific sqrt key.

So, to get a sqrt without a sqrt key:-

Type in the number you want to get the sqrt of, press the x^y key, type in 0.5.


To get the n th root of a number , type the number, press the x^y key and put in 1/n.

e.g root 3, use 1/3=0.33, root 4 put in 1/4=0.25 etc.

They could of course have done the obvious and put in a sqrt key, but when did microsoft last do the obvious to make it easier?

I stand corrected- Keillan is right as well! .

Answer 3

Since it seeems to be lost knowledge, the following routine can be used with a 4 function calculator:

Make a guess as to the sqrt (G1) of the number (N)
Divide N by G1, add the quotient to G1, divide by 2 to get G2.
Repeat this process until Gn and G(n+1) are as close as you like. You'll be surprised at how fast this series converges with any kind of a reasonable G1......

Answer 4

i tried everything and all i do is use trial and error that's the only way to get the squareroot of an answer using windows calculator



or you know if you don't know what the answer its like squareroot: 20

to get 20 you have 4*5

and you know the squareroot of 4 is 2

so you have 2*squareroot:5 yeah that's how i figure out things too
check ya later ♥

Answer 5

enter the number. example, enter 49 then hit the sqrt button in the upper right corner, gives you 7, the answer.

Answer 6

press the number, then press Inv at the top left, then press x^2

and there you go

However, don't forget there is also a negative side to the sqrt of that number.

Answer 7

I know of 6 ways to get a square root of a number

1) Use the x^y key ( type the number to square rooted, press the x^y , type .5,and press the " = " key or enter

2) Type the number, use the inv key, press x^2 , and press the " =" key or enter

3) Type in your number press the "log" key then divided by 2 press the " = " or "Enter" and use the inv and press the "log" key


4) Type in your number press the "ln" key then divide by 2 press the " =" key or "Enter" then select the inv spot and press the "ln" Key then press the " =" key or enter { this is the same thing as #3 but using a different log base }

5) use the follow method:

gn= (N/gn)+ gn)/2

repeat for about three to ten times ( see example #2 below) this is faster than the one below

6) use this method ; if you got a lot of time to kill and your bored:
( See example # 1 below )


example # 1:


start with a start square root in the first digit

(for example the square root of 26)

1. start with the closest square without going over in this case 5
2. add .1
3 store in memory, then multiply by 5, add result to the square number
4) square it or times that number by itself
5 ) get the answer
6) If it too low then add number in memory to squared numbered then # 10
7) if it too high for the number square rooted then # 11
8) replace your square number with new square number
9) multiply number in memory by .1
10) have you gone to as digits you want to go to? then Stop
11) goto # 4

11) subtract number by memory
12 goto # 4

Example #2

square root of 26 :

Step # 1 :

5

Step #2 :

.1 in memory

Step # 3:



5*.1 = .5

Step # 4:

5+.5 = 5.5

Step # 5

5.5* 5.5 = 30.25

Answer too high

5.5 - .1 = 5.4

doing Step #5 again

5.4^2 = 29.16

Answer still too high

5.4-.01= 5.3

doing step # 5 again

5.3 *5.3 = 28.09

Answer still too high

5.3-.1= 5.2

doing step 5 again

5.2*5.2= 27.04

answer still too high

5.2-.1= 5.1

5.1*5.1= 26.01

answer close. check to make sure it it not lower

5.1-.1 = 5.0

doing step 5 again

5.0*5.0= 25.

answer too low

gone to as many digits you want to go?

no

recall .1*.1 = .01

.01* 5 = .05

5.05 *5.05= 25.5025

answer too low

5.05+.01= 5.06

5.06*5.06= 25.6036

answer too low

5.07*5.07= 25.7049

answer too low

5.07+.01= 5.08

5.08* 5.08= 25.8064

answer too low

5.09*5.09= 26.01

answer close

Have we gone to as many digits as you want to go?

no

.01*.1= .001
.001 * 5 = .005

.005 + 5.095

5.095 * 5.095 = 25.959025

answer too low

5.095+ .001= 5.096


5.096*5.096= 25.969216

answer too low

5.096 + .001= 5.097

5.097*5.097= 25.979409

answer too low

5.097+ .001= 5.098

5.098*5.098= 25.989604

answer too low

5.098+ .001= 5.099

5.099*5.099= 25.999801

answer close

have you gone to as many digit you want to go?

no

.001*.1= .0001
.0001*5= .0005
5.099+.0005= 5.0995

5.0995*5.0995= 26.00490025

answer too high

5.0995-.0001= 5.0994

5.0994*50994= 26.00388036

answer too high

5.0994-.0001= 5.0993

50993*5.0993= 26.00286049

answer too high

5.0993-.0001= 5.0992

5.0992*5.0992= 26.00184064

answer too high

50992- .0001 = 5.0991
5.0991*5.0991= 26.00082081

answer too high

5.0991-.0001= 5.099
5.099* 5.099= 25.999801

answer too low

have we gone to as many digits you want to go to?
yes

5.099 is the apoximate square root accurate to 4 decimal places

I said that this is a great time waster but it will give you accurate results

Example #2:

the square root of 37

gn=( (N/gn)+Gn)/2

gn = guess root or square root
N= number to square root ( in this case 37)


start of run # 1

start with gn = 6

((37/6) + 6)/2= gn

(6.16666...)+6)/2= gn

12.6666.../2= gn

6.083333333..= gn

End of run #1


Start of run # 2 :

gn = 6.083333333

((37/6.083333333)+6.083333333)/2 =gn

(6.082191780...+ 6.083333333...)/2 = gn

12.165525114/2 = gn

6.082762557= gn

End of run #2

Start of run # 3:

gn = 6.082762557

((37/6.082762557) + 6.082762557)/2= gn

( 6.082762503+6.082762557 )/2 = gn

12.165525060/2 = gn

6.082762530= gn

End of run # 3


Start of run # 4:

gn = 6.082762530

((37/6.082762530)+ 6.082762530)/2= gn

(6.082762530+ 6.082762530)/2 = gn

12.16552506/2 = gn

6.082762530 =gn

End of run # 4

The Square root of 37 is appoximately equal to 6.082762530 accurate to nine decimal places

Answer 8

INV + x^2