More on significant figures | Decimals | Pre-Algebra | Khan Academy

[@cozycodingmeg]

my college professor just sent me here to learn this week's lesson. like seriously why am i paying for college when I can just watch this for free

[@matthewmilan707]

This video saved my life

[@onefiveo1058]

shut up

[@nikhilsingh5863]

so basically all the digits in a number are significant except for the zeros in front of a number and when there are no decimals, the zeros at the end of a number

[@lumonox]

Yes

[@curryeater259]

Sal, you've made me love science again

[@ManDudeYeah]

Sig figs just seem so arbitrary to me. So if you add a decimal, the zeros suddenly count? I haven't yet understood the pragmatic purpose of doing this (other than passing chemistry).

[@upbeat3535]

Do you understand now?

[@lumonox]

@@upbeat3535Jacobs

[@ThePejsek02468]

Adding a decimal means that the value was measured with more accuracy, allowing your result to be more precise.

[@CameronCope]

a rule of thumb i use when deciding on when to keep zeros is this: if you were to convert a number to scientific notation the leading zero's naturally fall away. yet the trailing zeros you would have to deliberately leave off - meaning that they are significant. for example .010400 --> 1.0400 e-2 notice that the leading zero 'naturally' falls away

[@McLovinYourMom205]

You're a life saver thank you so much for your videos!

[@swarit3737]

I understand significant figures now LOL. Thanks for an amazing vid :)

[@pranjitha1696]

Me 2

[@Iodine24]

Using for first year college General Chemistry. You are great, and uhhh, I think he's from Bangladesh! My country!

[@Syed-ze1sv]

Hahahh nice joke sucker

[@GloryOrBust]

+Pro Tanker what joke? There's no joke, it's just a statement. You're the sucker here!

[@Garr3tt76]

i seriously love all your videos, keep teaching chemistry and physics stuff please! i subbed too :D

[@FatimaZahra-ku2hl]

Same

[@michaelcanoe]

Can you or someone please let me know how you make these videos? What application or device are you using to write these equations?

[@FatimaZahra-ku2hl]

I lov ur vids they are AMAZING❤️👌👍👍

[@slang1984]

I'm done with this subjects years ago, but now I know what it's good for.

[@muhammadsahiranilaslam3240]

Good you saved my life

[@SpriceMachines]

i love you.

[@SethuIyer95]

Wow Man!! U r a God to those who r in dire need of education.

[@FatimaZahra-ku2hl]

No he not God he a good teacher

[@anandapatmanabhansu]

Thankyou sir❤

[@anandapatmanabhansu]

Sir if we measure a length as 4.700 m, it is same as 4700mm then does it have 2 or 4 significant figures.

[@thedespawner8292]

4 bc of the decimal point

[@MegaGangsta4life]

Thank you so much

[@trigt2001]

you helped me sooooo much!! thanks!

[@anandapatmanabhansu]

Sir i read in the text that significant figures are digits which are known reliably plus first uncertain digits, sir if we measure a value as 16000000m how will we say that we can precisely find only two digits.

[@gabsl1552]

Thanks! I'm preparing for entrance exam (college) :)

[@ibrahimmuhammad2339]

Hello did you pass your entrance exam?

[@Enzzo777]

Lol, 7 years later...

[@FatimaZahra-ku2hl]

Same me 2

[@kattijanardhan2714]

👌👌👌👌👌👌👌👌

[@hannahcohen8787]

Isn't having a dot at the end of a number the same as having a 0 behind it? As in 35. is the exact same as 35.0? Why would you say 35. is two sig figs and 35.0 is three?

[@wreckim]

Hanna, all it is, is that 35.0 means someone made sure that it wasn't 35.3 or 35.7. 35 is in fact often 35 exactly; as in 35 apples. But 35 inches could be the height of a child, yet his height might actually be 35.1...however 35 inches tells you that it was not measured any more 'significantly' than that...just two digits.

[@hamadvvvvlogs5286]

It means how u measured it

[@ianbaker6359]

thank god for this video.

[@Ghost572]

That goes onto standard notation and significant figures.

[@benjamin7231]

Thank you!!!!!!

[@KimGyunAh]

Wait so in the case of having trailing 0's and with no decimal, would i put the answer as: "ambiguos," or just not count the trailing 0's and put the answer? (When the question is: Count sig figs)

[@GazaAlley]

dude your the man!!!!! i love you!!! no Homo

[@wavesofgrey-vb9gw]

truncate or round Significant Figures?

[@wavesofgrey-vb9gw]

further khan videos reveal that sig figs are *rounded

[@Polarcupcheck]

I think, because like he said, you don't know where the zeros came from. The could be artificially created by taking something measured to 2.0, and moving the decimal and expressing as a different value (meters to centimeters). Something measured 2.00, you know was measured that precise, and would be 0.00200

[@janeanet]

thank you so much oh goodness

[@reillypiersimoni9920]

thank you soooooooooooo much

[@lmsgirl97]

God bless your soul

[@digiconvalley]

Thanksss (Y)

[@eirpcalc]

Perfect.

[@sankhya.b2521]

My physics teacher said something wrong.Have to enquire about that. Sal, the same thing u explained is given in the textbook but our teacher is teaching us wrong

[@pr1ckastley]

Sankhya Gowda Typical in India

[@KarMa-lx6oq]

ambiguous about being ambiguous about being ambiguous about being...

[@diwashpokhrel2607]

but in case of 37000 it may have 5 significant digit .But how it contains 2 significant digit . plz help me frens wiith clear examples .

[@lilacrosewood6730]

Diwash Pokhrel okay so since there isn't a decimal point at the end of 37000 you'd only be counting the non-zero numbers 3&7 as sig figs but not the trailing zeros at the end. This means there are only 2 sig figs which are the 3&7 in 37000

[@sharonjohn9115]

Why does 100 , only have 2 sig figs?

[@noorsoomro5866]

100 has only 1 sigfig

[@aznballer9604]

thankyou so muchhhh

[@DickHead69able]

FIRST! YEY! ♥KHANNNNNNNNNNNN♥

[@ritwikgossain8379]

Hi

[@areeshaislam1878]

I did'nt get the last point . You said 56,000 if there is no decimal point on the last then it will count as 2 significant but if there is decimal point on the last then it will count as 5 significant figures . But now you r saying there is 3 significant numbers how????? Anybody help me plzzz

[@angadjade1412]

first it has two significant digits then it has three ? im talking about the last part on 56000 ...i did nt get it

[@isabelladiaz2533]

angad jade He change it into scientific notation(that is another topic).

[@ritwikgossain8379]

I did not understand anything, could someone simplify pls i have a test

[@-MissSiri-]

Did you fail? 😂 Also you’re not alone…

[@charanm.h1767]

Mine is 999th like...

[@aqflarehawk]

1 person is a non significant person in this world.

[@nhynes123]

3 people are insignifigant

[@Leftovers515]

Hi, why not 705.001 are trailing zeros?

[@wz0077]

None of my teachers can explain things as well as you do.